The UVES Large Program for testing fundamental physics I. Bounds on a change in α towards quasar HE 2217−2818
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Context. Absorption-line systems detected in quasar spectra can be used to compare the value of the fine-structure constant, α, measured today on Earth with its value in distant galaxies. In recent years, some evidence has emerged of small temporal and also spatial variations in α on cosmological scales. These variations may reach a fractional level of ≈ 10 ppm (parts per million).
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The ESO/UVES Large Program was a dedicated program to test for the variation of fundamental constants with an optimized sample and methodology, with about 40 VLT nights over 2010-2013, typical resolution R ≈ 60,000 and signal-to-noise per pixel of order 100, leading to an expected accuracy of order 10^-6 on α_EM.
“Trying to confirm these results was the main motivation for an ESO/UVES Large Program (Molaro et al. 2013;Rahmani et al. 2013;Evans et al. 2014), a dedicated program to test for the variation of fundamental constants with an optimized sample and methodology with about 40 VLT nights of observations over 2010-2013 with a typical resolution of R $ 60 000 and a signal-to-noise per pixel of order 100,”
From Fundamental constants: from measurement to the universe, a window on gravitation and cosmology (2025) · cites this paper as Molaro et al. 2013
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Search for Time Variation of the Fine Structure Constant
Webb, J. K., Flambaum, V. V., Churchill, C. W., Drinkwater, M. J., & Barrow, J. D. (1999) · Physical Review Letters · doi:10.1103/physrevlett.82.884 · Cited by 754 · cited 1× · see citing works
“A first analysis using the many-multiplet method on quasar absorption spectra obtained at the Keck telescope revealed hints that in the early universe the fine structure constant was smaller than today by ∼6 parts-per-million (ppm; Webb et al. 1999; Murphy et al. 2001, 2003).”
MethodFurther evidence for a variable fine-structure constant from Keck/HIRES QSO absorption spectra
Murphy, M. T., Webb, J. K., & Flambaum, V. V. (2003) · Monthly Notices of the Royal Astronomical Society · doi:10.1046/j.1365-8711.2003.06970.x · Cited by 514 · cited 3× · see citing works
“A first analysis using the many-multiplet method on quasar absorption spectra obtained at the Keck telescope revealed hints that in the early universe the fine structure constant was smaller than today by ∼6 parts-per-million (ppm; Webb et al. 1999; Murphy et al. 2001, 2003).”
MethodSelf-citationIndications of a Spatial Variation of the Fine Structure Constant
Webb, J. K., King, J. A., Murphy, M. T., Flambaum, V. V., Carswell, R. F., & Bainbridge, M. B. (2011) · Physical Review Letters · doi:10.1103/physrevlett.107.191101 · Cited by 482 · cited 12× · see citing works
“In particular, the majority of the spectra analysed by King et al. (2012) were obtained in ‘service’ observing mode at the VLT.”
BackgroundMethodInfluentialSelf-citationMurphy, M. T., Webb, J. K., Flambaum, V. V., Dzuba, V. A., Churchill, C. W., Prochaska, J. X., Barrow, J. D., & Wolfe, A. M. (2001) · Monthly Notices of the Royal Astronomical Society · doi:10.1046/j.1365-8711.2001.04840.x · Cited by 355 · cited 1× · see citing works
“A first analysis using the many-multiplet method on quasar absorption spectra obtained at the Keck telescope revealed hints that in the early universe the fine structure constant was smaller than today by ∼6 parts-per-million (ppm; Webb et al. 1999; Murphy et al. 2001, 2003).”
MethodSelf-citationHigh-precision wavelength calibration of astronomical spectrographs with laser frequency combs
Murphy, M. T., Udem, T., Holzwarth, R., Sizmann, A., Pasquini, L., Araujo-Hauck, C., Dekker, H., D'Odorico, S., Fischer, M., Hänsch, T. W., et al. (2007) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2007.12147.x · Cited by 335 · cited 4× · see citing works
“The procedure for the selection of ThAr lines and the analysis leading to a wavelength solution follows that outlined in Murphy et al. (2007a).”
BackgroundMethodResultInfluentialSelf-citationSpace-Time Variation of Physical Constants and Relativistic Corrections in Atoms
Dzuba, V. A., Flambaum, V. V., & Webb, J. K. (1999) · Physical Review Letters · doi:10.1103/physrevlett.82.888 · Cited by 307 · cited 2× · see citing works
“C O troduced, which allows all observed transitions to be compared, gaining access to the typically much larger dependence of the ground state energy levels on α (Dzuba et al. 1999).”
BackgroundA new list of thorium and argon spectral lines in the visible
Lovis, C., & Pepe, F. A. (2007) · Astronomy and Astrophysics · doi:10.1051/0004-6361:20077249 · Cited by 290 · cited 2× · see citing works
“We note that uncertainties of the laboratory wavelengths of individual thorium lines vary from about 15 m s−1 up to more than 100 m s−1 for the poorly known lines (Lovis & Pepe 2007; Murphy et al. 2007a).”
BackgroundMethodSpatial variation in the fine-structure constant - new results from VLT/UVES
King, J. A., Webb, J. K., Murphy, M. T., Flambaum, V. V., Carswell, R. F., Bainbridge, M. B., Wilczynska, M. R., & Koch, F. E. (2012) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2012.20852.x · Cited by 261 · cited 8× · see citing works
“Overall, the variation across the sky can be simply and consistently represented by a monopole (i.e. a constant offset in α from the current laboratory value) plus a spatial dipole in the direction with right ascension 17.3 ± 1.0 hours and declination −61 ± 10 degrees (King et al. 2012).”
BackgroundMethodInfluentialSelf-citationProbing the cosmological variation of the fine-structure constant: Results based on VLT-UVES sample
Chand, H., Srianand, R., Petitjean, P., & Aracil, B. (2004) · Astronomy & Astrophysics · doi:10.1051/0004-6361:20035701 · Cited by 239 · cited 1× · see citing works
“…of smaller data sets obtained from the Very Large Telescope (VLT) in Chile by other groups did not confirm the variation of α (Quast et al. 2004; Chand et al. 2004; Levshakov et al. 2005, 2006), though in some cases these analysis and uncertainty estimates have been challenged (Murphy et al.…”
ResultSelf-citationHigh-precision wavelength calibration of astronomical spectrographs with laser frequency combsPreprint
Murphy, M. T., Udem, T., Holzwarth, R., Sizmann, A., Pasquini, L., Araujo-Hauck, C., Dekker, H., D’Odorico, S., Fischer, M., Hänsch, T. W., et al. (2024) · doi:10.25916/sut.26230757.v1 · Cited by 228 · see citing works
Self-citationProbing the variability of the fine-structure constant with the VLT UVES
Quast, R., Reimers, D., & Levshakov, S. A. (2003) · Springer Link (Chiba Institute of Technology) · doi:10.1051/0004-6361:20040013/pdf · Cited by 167 · see citing works
Self-citationProbing the variability of the fine-structure constant with the VLT/UVES
Quast, R., Reimers, D., & Levshakov, S. A. (2004) · Astronomy and Astrophysics · doi:10.1051/0004-6361:20040013 · Cited by 163 · cited 1× · see citing works
“However, the analysis of smaller data sets obtained from the Very Large Telescope (VLT) in Chile by other groups did not confirm the variation of α (Quast et al. 2004; Chand et al. 2004; Levshakov et al. 2005, 2006), though in some cases these analysis and uncertainty estimates have been challenged…”
ResultSelf-citationProbing the cosmological variation of the fine-structure constant: Results based on VLT-UVES sample
Chand, H., Srianand, R., Petitjean, P., & Aracil, B. (2004) · Springer Link (Chiba Institute of Technology) · doi:10.1051/0004-6361:20035701/pdf · Cited by 161 · see citing works
Self-citationSpatial variation in the fine-structure constant - new results from VLT/UVESPreprint
King, J. A., Webb, J. K., Murphy, M. T., Flambaum, V. V., Carswell, R. F., Bainbridge, M., Wilczynska, M. R., & Koch, F. (2016) · Cited by 146 · see citing works
Self-citationHigh-precision calibration of spectrographs
Wilken, T., Lovis, C., Manescau, A., Steinmetz, T., Pasquini, L., Curto, G. L., Hänsch, T. W., Holzwarth, R., & Udem, T. (2010) · Monthly Notices of the Royal Astronomical Society Letters · doi:10.1111/j.1745-3933.2010.00850.x · Cited by 138 · cited 1× · see citing works
“Wilken et al. (2010) on spectra obtained with the HARPS spectrograph at the 3.6m ESO telescope on La Silla, and calibrated by means of a Laser Frequency Comb detected very small differences in the size of physical pixels due to CCD manufacturing.”
MethodPhysical Constants in Extra-Galactic Nebulæ
Savedoff, M. P. (1956) · Nature · doi:10.1038/178688b0 · Cited by 107 · cited 1× · see citing works
“The seminal papers of Savedoff (1956) and Bahcall et al. (1967) took advantage of the dependence of the relative separation of fine-structure doublet transitions on α and used the alkali doublets observed in the first extragalactic sources to limit ∆α/α at the level of a few percent.”
BackgroundRevision of VLT/UVES constraints on a varying fine-structure constant
Murphy, M. T., Webb, J. K., & Flambaum, V. V. (2008) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2007.12695.x · Cited by 104 · cited 1× · see citing works
“…Very Large Telescope (VLT) in Chile by other groups did not confirm the variation of α (Quast et al. 2004; Chand et al. 2004; Levshakov et al. 2005, 2006), though in some cases these analysis and uncertainty estimates have been challenged (Murphy et al. 2007b, 2008) (but see Srianand et al. 2007).”
ResultSelf-citationAn Analysis of the Absorption Spectrum of 3c 191
Bahcall, J. N., Sargent, W. L. W., & Schmidt, M. (1967) · The Astrophysical Journal · doi:10.1086/180042 · Cited by 100 · cited 1× · see citing works
“The seminal papers of Savedoff (1956) and Bahcall et al. (1967) took advantage of the dependence of the relative separation of fine-structure doublet transitions on α and used the alkali doublets observed in the first extragalactic sources to limit ∆α/α at the level of a few percent.”
BackgroundRevision of VLT/UVES constraints on a varying fine-structure constant
Murphy, M. T., Webb, J. K., & Flambaum, V. V. (2006) · UNSWorks (UNSW Sydney) · Cited by 97 · see citing works
Self-citationGriest, K., Whitmore, J. B., Wolfe, A. M., Prochaska, J. X., Howk, J. C., & Marcy, G. W. (2010) · The Astrophysical Journal · doi:10.1088/0004-637x/708/1/158 · Cited by 94 · cited 1× · see citing works
“The possible presence of distortions in wavelength scales of Keck/HIRES spectra was investigated by Griest et al. (2010) by comparing the ThAr wavelength scale with that established from I2-cell observations.”
MethodSelf-citationMurphy, M. T., Webb, J. K., & Flambaum, V. V. (2007) · Physical Review Letters · doi:10.1103/physrevlett.99.239001 · Cited by 91 · cited 4× · see citing works
“The procedure for the selection of ThAr lines and the analysis leading to a wavelength solution follows that outlined in Murphy et al. (2007a).”
BackgroundMethodResultInfluentialSelf-citationAgafonova, I. I., Molaro, P., Levshakov, S. A., & Hou, J. L. (2011) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201016194 · Cited by 81 · see citing works
Self-citationUVES radial velocity accuracy from asteroid observations
Molaro, P. P., Levshakov, S. A., Monai, S., Centurión, M., Bonifacio, P., D’Odorico, S., & Monaco, L. (2008) · Astronomy and Astrophysics · doi:10.1051/0004-6361:20078864 · Cited by 76 · cited 2× · see citing works
“Molaro et al. (2008a) compared the radial velocity measured in the two arms using the sunlight reflected by an asteroid, and came to a similar conclusion.”
ResultInfluentialSelf-citationBounds on the fine structure constantvariability from Fe ii absorption lines in QSO spectra
Molaro, P. P., Reimers, D., Agafonova, I. I., & Levshakov, S. A. (2008) · The European Physical Journal Special Topics · doi:10.1140/epjst/e2008-00818-4 · Cited by 73 · cited 2× · see citing works
“Molaro et al. (2008a) compared the radial velocity measured in the two arms using the sunlight reflected by an asteroid, and came to a similar conclusion.”
ResultInfluentialSelf-citationWAVELENGTH CALIBRATION OF THE VLT-UVES SPECTROGRAPH
Whitmore, J. B., Murphy, M. T., & Griest, K. (2010) · The Astrophysical Journal · doi:10.1088/0004-637x/723/1/89 · Cited by 72 · cited 3× · see citing works
“Whitmore et al. (2010) repeated the same test for UVES and found similar effects, though the saw-tooth distortion shows reduced peak-to-peak velocity variations of ∼200 m s−1.”
BackgroundMethodInfluentialSelf-citationVLT/UVES constraints on the cosmological variability of the fine-structure constant
Levshakov, S. A., Centurión, M., Molaro, P. P., & D’Odorico, S. (2005) · Astronomy and Astrophysics · doi:10.1051/0004-6361:20041827 · Cited by 71 · cited 3× · see citing works
“Using just one ionic species alleviates the possibility that ionization effects may systematically affect ∆α/α (e.g. Levshakov et al. 2005).”
BackgroundResultInfluentialSelf-citationSrianand, R., Chand, H., Petitjean, P., & Aracil, B. (2007) · Physical Review Letters · doi:10.1103/physrevlett.99.239002 · Cited by 59 · cited 1× · see citing works
“…Very Large Telescope (VLT) in Chile by other groups did not confirm the variation of α (Quast et al. 2004; Chand et al. 2004; Levshakov et al. 2005, 2006), though in some cases these analysis and uncertainty estimates have been challenged (Murphy et al. 2007b, 2008) (but see Srianand et al. 2007).”
ResultSelf-citationOlive, K. A., Peloso, M., & Uzan, J.-P. (2011) · Physical Review D · doi:10.1103/physrevd.83.043509 · Cited by 44 · cited 1× · see citing works
“One can nevertheless reproduce it by constructing toy models, for example as the result of domains formed at spontaneous breaking of a discrete symmetry of a dilaton-like scalar field coupled to electromagnetism (Olive et al. 2011).”
BackgroundMolaro, P. P., Levshakov, S. A., Monai, S., Centurión, M., Bonifacio, P., D’Odorico, S., & Monaco, L. (2007) · arXiv (Cornell University) · doi:10.48550/arxiv.0712.3345 · Cited by 40 · cited 2× · see citing works
“Molaro et al. (2008a) compared the radial velocity measured in the two arms using the sunlight reflected by an asteroid, and came to a similar conclusion.”
ResultInfluentialSelf-citationQSO 0347-383 and the invariance ofmp/mein the course of cosmic time
Wendt, M., & Molaro, P. P. (2012) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201218862 · Cited by 39 · cited 2× · see citing works
“Indeed, this effect has been measured by Wendt & Molaro (2012) by crosscorrelating 15 UVES spectra of quasar Q0347−383.”
BackgroundMethodSelf-citationVariation of fundamental parameters and dark energy: A principal component approach
Amendola, L., Leite, A. C. O., Martins, C. J. A. P., Nunes, N. J., Pedrosa, P. O. J., & Seganti, A. (2012) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.86.063515 · Cited by 36 · cited 1× · see citing works
“In addition to their intrinsic interest, these measurements (whether they are detections or null results) can shed light on the enigma of dark energy (Amendola et al. 2012).”
BackgroundSelf-citationWavelengths of the <?Pub Caret?>3d^6(^5D)4s a^6D−3d^5(^6S)4s4p y^6P multiplet of Fe II (UV 8)
Nave, G., & Sansonetti, C. J. (2011) · Journal of the Optical Society of America B · doi:10.1364/josab.28.000737 · Cited by 31 · cited 1× · see citing works
“In particular, the laboratory wavelength for the Fe ii λ1608 transition was taken from Nave & Sansonetti (2011).”
MethodLevshakov, S. A., Centurión, M., Molaro, P. P., & Костина, М. В. (2006) · Astronomy and Astrophysics · doi:10.1051/0004-6361:200600001 · Cited by 24 · see citing works
Self-citationProbing variations in the fundamental constants with quasar absorption lines
Murphy, M. T. (2003) · UNSWorks (UNSW Sydney) · doi:10.5281/zenodo.57184 · Cited by 14 · see citing works
Self-citationSpectrographs, Asteroids and Constants
Molaro, P. P., Centurión, M., Monai, S., & Levshakov, S. A. (2011) · Astrophysics and space science proceedings · doi:10.1007/978-3-642-19397-2_17 · Cited by 1 · cited 1× · see citing works
“We note that Molaro et al. (2011) compared solar features observed both with HARPS and UVES and found such ‘intra-order distortions’ in the UVES spectrum with a typical scale of ≈10 Å.”
MethodSelf-citation
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Challenges for Λ CDM: An update
Perivolaropoulos, L., & Skara, F. (2022) · New Astronomy Reviews · doi:10.1016/j.newar.2022.101659 · Cited by 954 · see citing works
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Self-citationTeleparallel gravity: from theory to cosmology
Bahamonde, S., Dialektopoulos, K. F., Escamilla‐Rivera, C., Farrugia, G., Gakis, V., Hendry, M., Hohmann, M., Said, J. L., Mifsud, J., & Valentino, E. D. (2022) · Reports on Progress in Physics · doi:10.1088/1361-6633/ac9cef · Cited by 506 · see citing works
Thirty Meter Telescope Detailed Science Case: 2015
Skidmore, W. (2015) · Research in Astronomy and Astrophysics · doi:10.1088/1674-4527/15/12/001 · Cited by 191 · see citing works
The status of varying constants: a review of the physics, searches and implications
Martins, C. J. A. P. (2017) · Reports on Progress in Physics · doi:10.1088/1361-6633/aa860e · Cited by 179 · see citing works
Self-citationXQ-100: A legacy survey of one hundred 3.5 ≲z≲ 4.5 quasars observed with VLT/X-shooter
López, S., D’Odorico, V., Ellison, S. L., Becker, G. D., Christensen, L., Cupani, G., Denney, K. D., Pâris, I., Worseck, G., Berg, T. A. M., et al. (2016) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201628161 · Cited by 112 · see citing works
“…Schaye et al. 2000; Kim et al. 2002); reionization (e.g., Becker, Rauch & Sargent 2007; Becker et al. 2012, 2015); matter power spectrum (e.g., Croft et al. 2002; Viel et al. 2004, 2009, 2013); and fundamental constants (e.g., Murphy, Webb & Flambaum 2003; Srianand et al. 2004; Molaro et al. 2013).”
BackgroundRahmani, H., Wendt, M., Srianand, R., Noterdaeme, P., Petitjean, P., Molaro, P., Whitmore, J. B., Murphy, M. T., Centurion, M., Fathivavsari, H., et al. (2013) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stt1356 · Cited by 108 · see citing works
Self-citationThe UVES Spectral Quasar Absorption Database (SQUAD) data release 1: the first 10 million seconds
Murphy, M. T., Kacprzak, G. G., Savorgnan, G. A. D., & Carswell, R. F. (2018) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/sty2834 · Cited by 102 · see citing works
“UVES quasar spectra have even been used to constrain cosmological variations in the fundamental constants of nature (e.g. Quast, Reimers & Levshakov 2004; King et al. 2008, 2012; Rahmani et al. 2013; Molaro et al. 2013; Murphy, Malec & Prochaska 2016).”
BackgroundMethodInfluentialSelf-citationImpact of instrumental systematic errors on fine-structure constant measurements with quasar spectra
Whitmore, J. B., & Murphy, M. T. (2014) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stu2420 · Cited by 99 · see citing works
“…Published by Oxford University Press on behalf of the Royal Astronomical Society nloaded from https://academ ic.oup.com /m nras/article-abstract/447/1/446/989133 by guest on 16 M arch 2020 absorption systems (e.g. Quast, Reimers & Levshakov 2004; Levshakov et al. 2007; Molaro et al. 2008a, 2013a).”
BackgroundInfluentialSelf-citationEvans, T. M., Murphy, M. T., Whitmore, J. B., Misawa, T., Centurion, M., D'Odorico, S., Lopez, S., Martins, C. J. A. P., Molaro, P., Petitjean, P., et al. (2014) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stu1754 · Cited by 75 · see citing works
“To this end, the Large Programme has taken many supercalibrations and we will further discuss these distortions in future papers.”
BackgroundMethodInfluentialSelf-citationThe primordial deuterium abundance: subDLA system at z abs = 2.437 towards the QSO J 1444+2919
Balashev, S. A., Zavarygin, E. O., Ivanchik, A. V., Telikova, K., & Varshalovich, D. A. (2016) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stw356 · Cited by 75 · see citing works
“…Telescope and calibrated with a ThAr lamp show both velocity offsets between different exposures and intraorder velocity distortions within each exposure (see e.g. Griest et al. 2010; Whitmore, Murphy & Griest 2010; Wendt & Molaro 2011; Molaro et al. 2013; Rahmani et al. 2013; Evans et al. 2014).”
MethodObservational constraints on f(T) gravity from varying fundamental constants
Nunes, R. C., Bonilla, A., Pan, S., & Saridakis, E. N. (2017) · The European Physical Journal C · doi:10.1140/epjc/s10052-017-4798-5 · Cited by 74 · see citing works
Kotuš, S., Murphy, M. T., & Carswell, R. F. (2016) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stw2543 · Cited by 71 · see citing works
“For example, by correcting the previously studied UVES spectra of HE 2217−2818 (Molaro et al. 2013a) with just ∼3 hours of ESPRESSO observations, a residual calibration error of 0.6 ppm would be very small compared to the statistical error of 2.4 ppm from the UVES spectra of the zabs = 1.6919…”
BackgroundMethodResultInfluentialSelf-citationTesting the isotropy of the Universe by using the JLA compilation of Type Ia supernovae
Lin, H.-N., Wang, S., Chang, Z., & Li, X. (2015) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stv2804 · Cited by 64 · see citing works
Colloquium: Search for a drifting proton-electron mass ratio from H2
Ubachs, W., Bagdonaite, J., Salumbides, E. J., Murphy, M. T., & Kaper, L. (2016) · Reviews of Modern Physics · doi:10.1103/revmodphys.88.021003 · Cited by 56 · see citing works
Self-citationConstraints on changes in the proton–electron mass ratio using methanol lines
Kanekar, N., Ubachs, W., Menten, K. M., Bagdonaite, J., Brunthaler, A., Henkel, C., Müller, S., Bethlem, H. L., & Dapra, M. (2015) · Monthly Notices of the Royal Astronomical Society Letters · doi:10.1093/mnrasl/slu206 · Cited by 54 · see citing works
“Furthermore, the joint fit simultaneously makes use of all the information in the different li es (e.g. Webb et al. 2001; Molaro et al. 2013; Rahmani et al. 2013).”
BackgroundMethodGeneral dynamics of varying-alpha universes
Barrow, J. D., & Graham, A. A. H. (2013) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.88.103513 · Cited by 54 · see citing works
Subaru Telescope limits on cosmological variations in the fine-structure constant
Murphy, M. T., & Cooksey, K. L. (2017) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stx1949 · Cited by 54 · see citing works
“…scales (e.g. Webb et al. 1999; Murphy et al. 2001a; Murphy, Webb & Flambaum 2003; Quast, Reimers & Levshakov 2004; Levshakov et al. 2005, 2007; Molaro et al. 2008a; Murphy, Webb & Flambaum 2008b; Agafonova et al. 2011; Webb et al. 2011; King et al. 2012; Molaro et al. 2013; Songaila & Cowie 2014).”
BackgroundMethodResultInfluentialSelf-citationMurphy, M. T., Molaro, P. P., Leite, A. C. O., Cupani, G., Cristiani, S., D’Odorico, V., Génova-Santos, R., Martins, C. J. A. P., Milaković, D., Nunes, N. J., et al. (2021) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202142257 · Cited by 54 · see citing works
Self-citationRunning vacuum in the Universe and the time variation of the fundamental constants of Nature
Fritzsch, H., Solà, J., & Nunes, R. C. (2017) · The European Physical Journal C · doi:10.1140/epjc/s10052-017-4714-z · Cited by 53 · see citing works
Anisotropy of the Universe via the Pantheon supernovae sample revisited
Zhao, D., Zhou, Y., & Chang, Z. (2019) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stz1259 · Cited by 53 · see citing works
“In addition, the spatial variation of finestructure constant (Webb et al. 2011; King et al. 2012; Mariano & Perivolaropoulos 2012; Molaro et al. 2013) and MOND acceleration scale (Zhou et al. 2017; Chang et al. 2018b; Chang & Zhou 2018) are inconsistent with isotropic universe.”
BackgroundLaboratory atomic transition data for precise optical quasar absorption spectroscopy
Murphy, M. T., & Berengut, J. C. (2013) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stt2204 · Cited by 52 · see citing works
Self-citationSongaila, A., & Cowie, L. L. (2014) · The Astrophysical Journal · doi:10.1088/0004-637x/793/2/103 · Cited by 48 · see citing works
“However, this positive result is limited to one group and more stringent null results, using the same methodology, have been reported (Srianand et al. 2004; Chand et al. 2004, 2006; Levshakov et al. 2006; Molaro et al. 2013).”
ResultSchmidt, T. M., Molaro, P. P., Murphy, M. T., Lovis, C., Cupani, G., Cristiani, S., Pepe, F. A., Rebolo, R., Santos, N. C., Abreu, M., et al. (2020) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202039345 · Cited by 46 · see citing works
Self-citationD’Odorico, V., Cristiani, S., Pomante, E., Carswell, R. F., Viel, M., Barai, P., Becker, G. D., Calura, F., Cupani, G., Fontanot, F., et al. (2016) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stw2161 · Cited by 45 · see citing works
Running vacuum in the Universe and the time variation of the fundamental constants of Nature
Harald Fritzsch, A., Solà, J., & Nunes, R. C. (2017) · Dipòsit Digital de la Universitat de Barcelona (Universitat de Barcelona) · Cited by 45 · see citing works
Evolution of the fine-structure constant in runaway dilaton models
Martins, C. J. A. P., Vielzeuf, P., Martinelli, M., Calabrese, E., & Pandolfi, S. (2015) · Physics Letters B · doi:10.1016/j.physletb.2015.03.002 · Cited by 40 · see citing works
Self-citationMurphy, M. T., Malec, A. L., & Prochaska, J. X. (2016) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stw1482 · Cited by 39 · see citing works
“A similar approach was used in several other recent varying-constant studies (e.g. Malec et al. 2010; Molaro et al. 2013; Bagdonaite et al. 2014; Evans et al. 2014), with the latter three using smaller amplitudes of ∆v = 100 m s−1 which are typical of those found in both HIRES and UVES spectra in…”
BackgroundMethodResultInfluentialSelf-citationDark energy coupling with electromagnetism as seen from future low-medium redshift probes
Calabrese, E., Martinelli, M., Pandolfi, S., Cardone, V. F., Martins, C. J. A. P., Spiro, S., & Vielzeuf, P. (2014) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.89.083509 · Cited by 39 · see citing works
Self-citationSongaila, A., & Cowie, L. L. (2016) · Cited by 39 · see citing works
Schmidt, T. M., Molaro, P. P., Murphy, M. T., Lovis, C., Cupani, G., Cristiani, S., Pepe, F. A., Rebolo, R., Santos, N. C., Abreu, M. A., et al. (2021) · BORIS (University Library Bern) · Cited by 37 · see citing works
Self-citationThe variation of the fine-structure constant from disformal couplings
van de Bruck, C., Mifsud, J., & Nunes, N. J. (2015) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2015/12/018 · Cited by 33 · see citing works
Said, J., Mifsud, J., Parkinson, D., Saridakis, E., Sultana, J., & Adami, K. Z. (2020) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2020/11/047 · Cited by 31 · see citing works
Stability of fundamental couplings: A global analysis
Martins, C. J. A. P., & Pinho, A. M. M. (2017) · Physical Review D · doi:10.1103/physrevd.95.023008 · Cited by 32 · see citing works
Self-citationFundamental constants: from measurement to the universe, a window on gravitation and cosmology
Uzan, J.-P. (2025) · Living Reviews in Relativity · doi:10.1007/s41114-025-00059-y · Cited by 36 · see citing works
New wavelength calibration of the HARPS spectrograph
Coffinet, A., Lovis, C., Dumusque, X., & Pepe, F. (2019) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201833272 · Cited by 22 · see citing works
“Molaro et al. (2013b) noted an offset of four pixels between the physical positions of the gaps on the CCD (at n j = 512 j px) and the positions observed on the flat fields (at n j = (512 j + 4) px), and that one or two pixels are involved at each time.”
BackgroundResultInfluentialMartins, C. J. A. P. (2014) · General Relativity and Gravitation · doi:10.1007/s10714-014-1843-7 · Cited by 30 · see citing works
Self-citationConsistency tests of the stability of fundamental couplings and unification scenarios
Ferreira, M. C., Frigola, O., Martins, C. J. A. P., Monteiro, A. M. R. V. L., & Solà, J. (2014) · Physical Review D · doi:10.1103/physrevd.89.083011 · Cited by 29 · see citing works
Self-citationLimits on the spatial variations of the electron-to-proton mass ratio in the Galactic plane
Levshakov, S. A., Reimers, D., Henkel, C., Winkel, B., Mignano, A., Centurión, M., & Molaro, P. P. (2013) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201322535 · Cited by 28 · see citing works
Self-citationNew wavelength calibration of the HARPS spectrograph
Coffinet, A., Lovis, C., Dumusque, X., & Pepe, F. A. (2019) · Springer Link (Chiba Institute of Technology) · doi:10.1051/0004-6361/201833272/pdf · Cited by 27 · see citing works
Fundamental constants and high‐resolution spectroscopy
Bonifacio, P., Rahmani, H., Whitmore, J. B., Wendt, M., Centurion, M., Molaro, P. P., Srianand, R., Murphy, M. T., Petitjean, P., Agafonova, I. I., et al. (2014) · Astronomische Nachrichten · doi:10.1002/asna.201312005 · Cited by 27 · see citing works
“The first result of our Large Programme is the analysis of ∆α/α in the absorption systems towards HE 2217−2818 and has been presented in Molaro et al. (2013).”
MethodSelf-citationStringent Constraints on Fundamental Constant Evolution Using Conjugate 18 cm Satellite OH Lines
Kanekar, N., Ghosh, T., & Chengalur, J. N. (2018) · Physical Review Letters · doi:10.1103/physrevlett.120.061302 · Cited by 26 · see citing works
Albareti, F. D., Comparat, J., Gutiérrez, C. M., Prada, F., Pâris, I., Schlegel, D. J., López-Corredoira, M., Schneider, D. P., Manchado, A., García-Hernández, D. A., et al. (2015) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stv1406 · Cited by 26 · see citing works
“The measurements on absorption features on a quasar spectrum are currently limited by the precision in the wavelength calibration of the spectra, i.e., 50 to 200 m s−1 using spectra withR= 60, 000 (Molaro et al. 2013; Evans et al. 2014; Whitmore & Murphy 2015).”
MethodSelf-citationVariation in the fine-structure constant and the distance-duality relation
Gonçalves, R. S., Landau, S., Alcaniz, J., & Holanda, R. (2019) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2020/06/036 · Cited by 11 · see citing works
Varying electric charge in multiscale spacetimes
Calcagni, G., Magueijo, J., & Fernández, D. R. (2014) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.89.024021 · Cited by 24 · see citing works
Updated constraints on spatial variations of the fine-structure constant
Pinho, A. M., & Martins, C. J. A. P. (2016) · Physics Letters B · doi:10.1016/j.physletb.2016.03.014 · Cited by 23 · see citing works
Self-citationFine-structure constant constraints on dark energy
Martins, C. J. A. P., & Pinho, A. M. (2015) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.91.103501 · Cited by 23 · see citing works
Self-citationDistinguishing modified gravity models
Brax, P., & Davis, A.-C. (2015) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2015/10/042 · Cited by 21 · see citing works
“We will consider both the effects of chameleon, K-mouflage and Vainshtein mechanisms on the variation of constants [19, 20] and on the time drift of the redshift for distant objects [21].”
MethodFine-structure constant constraints on dark energy. II. Extending the parameter space
Martins, C. J. A. P., Pinho, A. M., Carreira, P., Gusart, A., López, J., & Rocha, C. I. S. A. (2016) · Physical review. D/Physical review. D. · doi:10.1103/physrevd.93.023506 · Cited by 21 · see citing works
Self-citationA tomographic test of cosmological principle using the JLA compilation of type Ia supernovae
Chang, Z., Lin, H.-N., Sang, Y., & Wang, S. (2018) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/sty1120 · Cited by 21 · see citing works
Martins, C. J. A. P., Pinho, A. M. M., Alves, R. F. C., Pino, M., Rocha, C. I. S. A., & von Wietersheim-Kramsta, M. (2015) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2015/08/047 · Cited by 20 · see citing works
Self-citationSpatial variations of the fine-structure constant in symmetron models
Silva, M. F., Winther, H. A., Mota, D. F., & Martins, C. J. A. P. (2014) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.89.024025 · Cited by 20 · see citing works
Self-citationGalaxy clusters, type Ia supernovae and the fine structure constant
Holanda, R. F. L., Busti, V. C., Colaço, L. R., Alcaniz, J. S., & Landau, S. J. (2016) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2016/08/055 · Cited by 20 · see citing works
Probing the constancy of the speed of light with future galaxy survey: The case of SKA and Euclid
Salzano, V., Da̧browski, M. P., & Lazkoz, R. (2016) · Physical review. D/Physical review. D. · doi:10.1103/physrevd.93.063521 · Cited by 17 · see citing works
Galaxy clusters, type Ia supernovae and the fine structure constant
Holanda, R. F. L., Busti, V. C., Colaco, R. L., Alcaniz, J. S., & Landau, S. J. (2016) · CONICET Digital (CONICET) · Cited by 18 · see citing works
Rahmani, H., Maheshwari, N., & Srianand, R. (2014) · Monthly Notices of the Royal Astronomical Society Letters · doi:10.1093/mnrasl/slt183 · Cited by 17 · see citing works
Self-citationLevshakov, S. A., Ng, K., Henkel, C., Mookerjea, B., Agafonova, I. I., Liu, S.-Y., & Wang, W.-H. (2019) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stz1628 · Cited by 16 · see citing works
“…et al. 2004) and ∆α/α = (−0.1 ± 0.8) × 10−6 (Levshakov et al. 2006) at z = 1.15; ∆α/α = (−1.5± 2.6)× 10−6 at z = 1.58 (Agafonova et al. 2011); ∆α/α = (1.3± 2.4)× 10−6 at z = 1.69 (Molaro et al. 2013); ∆α/α = (−1.4 ± 0.9) × 10−6 at z = 1.15 (Kotuš et al. 2017); ∆α/α = (3.3± 2.9)× 10−6 at z = 1.84…”
InfluentialSelf-citationNandy, D. K., Singh, Y., & Sahoo, B. K. (2014) · Physical Review A · doi:10.1103/physreva.89.062509 · Cited by 16 · see citing works
Recovering a redshift-extended varying speed of light signal from galaxy surveys
Salzano, V. (2017) · Physical review. D/Physical review. D. · doi:10.1103/physrevd.95.084035 · Cited by 15 · see citing works
Modelling Spatial Variations of the Speed of Light
Balcerzak, A., Da̧browski, M. P., & Salzano, V. (2017) · Annalen der Physik · doi:10.1002/andp.201600409 · Cited by 14 · see citing works
Fundamental constant observational bounds on the variability of the QCD scale
Thompson, R. I. (2017) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stx433 · Cited by 15 · see citing works
Time variations of narrow absorption lines in high resolution quasar spectra
Boissé, P., Bergeron, J., Prochaska, J. X., Péroux, C., & York, D. G. (2015) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201526289 · Cited by 14 · see citing works
“…wavelength calibrations accomplished recently in the context of the ESO Large Program designed to constrain the variation of fundamental constants (Molaro et al. 2013) or forseen for instruments that will become available in the near future (e.g. the ESPRESSO spectrograph to be mounted on the…”
BackgroundPetitjean, P., Wang, F. Y., Wu, X. F., & Wei, J. J. (2016) · Space Science Reviews · doi:10.1007/s11214-016-0235-6 · Cited by 14 · see citing works
“Along each line-ofsight there is at least one absorber in which we expect a precision approaching 2 ppm on the variation of α based on the variety of metal-line transitions available and the shape/structure of their absorption profiles (see Molaro et al. 2013).”
BackgroundSelf-citationA tomographic test of cosmic anisotropy with the recently-released quasar sample
Zhao, D., & Xia, J. (2021) · The European Physical Journal C · doi:10.1140/epjc/s10052-021-09701-9 · Cited by 14 · see citing works
Reappraisal of the limit on the variation in α implied by the Oklo natural fission reactors
Davis, E. D. D., & Hamdan, L. (2015) · Physical Review C · doi:10.1103/physrevc.92.014319 · Cited by 14 · see citing works
Alves, C., Leite, A. C., Martins, C., Silva, T., Berge, S., & Silva, B. A. (2018) · Physical review. D/Physical review. D. · doi:10.1103/physrevd.97.023522 · Cited by 7 · see citing works
Self-citationWhite Dwarf Spectra for Studies of Time Variation of the Fine Structure Constant
Le, T. D. (2019) · Brazilian Journal of Physics · doi:10.1007/s13538-018-00634-5 · Cited by 14 · see citing works
Dark energy constraints from ESPRESSO tests of the stability of fundamental couplings
Leite, A. C. O., Martins, C. J. A. P., Molaro, P. P., Corre, D., & Cristiani, S. (2016) · Physical review. D/Physical review. D. · doi:10.1103/physrevd.94.123512 · Cited by 13 · see citing works
Self-citationFundamental cosmology from precision spectroscopy: Varying couplings
Leite, A. C. O., Martins, C. J. A. P., Pedrosa, P. O. J., & Nunes, N. J. (2014) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.90.063519 · Cited by 13 · see citing works
Self-citationEnvironmental variation of constants in screened modified theories of gravity
Brax, P. (2014) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.90.023505 · Cited by 13 · see citing works
Improved Ni II oscillator strengths from quasar absorption systems
Boissé, P., & Bergeron, J. (2019) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201834308 · Cited by 13 · see citing works
Jiang, L.-H., Pan, Z., Aguilar, J., Ahlen, S., Blum, R., Brooks, D., Claybaugh, T., de la Macorra, A., Dey, A., Doel, P., et al. (2024) · Astrophysical Journal · doi:10.3847/1538-4357/ad47b4 · Cited by 8 · see citing works
“Therefore, later studies are mostly based on the MM method (e.g., Molaro et al. 2013; Songaila & Cowie 2014; Wilczynska et al. 2015; Kotuˇs et al. 2017; Milakovi´c et al. 2021), and so far the strongest constraints (null results) on the α variation are also from this method.”
MethodCosmic microwave background search for fine-structure constant evolution
Tohfa, H., Crump, J. H., Baker, E., Hart, L., Grin, D., Brosius, M., & Chluba, J. (2024) · Physical Review D · doi:10.1103/physrevd.109.103529 · Cited by 2 · see citing works
Further consistency tests of the stability of fundamental couplings
Ferreira, M., & Martins, C. J. A. P. (2015) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.91.124032 · Cited by 12 · see citing works
Self-citationBergeron, J., & Boissé, P. (2017) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201730906 · Cited by 12 · see citing works
“The UVES and HIRES data for the quasars we selected to investigate spatial covering of intervening absorbers are all public and have high S/N spectra: UVES (Bergeron et al. 2004; Molaro et al. 2013) and HIRES (Prochaska et al. 2007).”
MethodFine-structure constant constraints on Bekenstein-type models
Leal, P., Martins, C. J. A. P., & Ventura, L. B. (2014) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.90.027305 · Cited by 12 · see citing works
Self-citationVarying Constants Entropic-ΛCDM Cosmology
Da̧browski, M., Gohar, H., & Salzano, V. (2016) · Entropy · doi:10.3390/e18020060 · Cited by 12 · see citing works
Current and future constraints on Bekenstein-type models for varying couplings
Leite, A. C. O., & Martins, C. J. A. P. (2016) · Physical review. D/Physical review. D. · doi:10.1103/physrevd.94.023503 · Cited by 12 · see citing works
Self-citationTesting cosmic anisotropy with the Ep−Eiso (‘Amati’) correlation of GRBs
Zhao, D., & Xia, J. (2022) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stac498 · Cited by 12 · see citing works
Spectral properties of a few F-like ions
Nandy, D. K., & Sahoo, B. K. (2014) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201322931 · Cited by 12 · see citing works
Variations of the fine-structure constant α in exotic singularity models
Da̧browski, M. P., Denkiewicz, T., Martins, C. J. A. P., & Vielzeuf, P. (2014) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.89.123512 · Cited by 11 · see citing works
Self-citationA NEW METHOD FOR DETECTING VELOCITY SHIFTS AND DISTORTIONS BETWEEN OPTICAL SPECTRA
Evans, T. M., & Murphy, M. T. (2013) · The Astrophysical Journal · doi:10.1088/0004-637x/778/2/173 · Cited by 11 · see citing works
“Molaro et al. (2013) present the first measurements of Δα/α from a new observational program using the VLT/UVES.”
MethodSelf-citationFine-structure transitions as a tool for studying variation of α at high redshifts
Levshakov, S. A., & Kozlov, M. G. (2017) · Monthly Notices of the Royal Astronomical Society Letters · doi:10.1093/mnrasl/slx049 · Cited by 11 · see citing works
“Since that time there appeared a number of controversial results suggesting a time dependence of α and restricting ∆α/α values to the same level of a few 10−6 (see, e.g., Molaro et al. 2013, and references cited therein).”
BackgroundSelf-citationA new method for instrumental profile reconstruction of high-resolution spectrographs
Milaković, D., & Jethwa, P. (2024) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202348532 · Cited by 10 · see citing works
Cosmological and astrophysical constraints on tachyon dark energy models
Martins, C. J. A. P., & Moucherek, F. M. O. (2016) · Physical review. D/Physical review. D. · doi:10.1103/physrevd.93.123524 · Cited by 10 · see citing works
Self-citation[C i], [C ii] and CO emission lines as a probe for α variations at low and high redshifts
Levshakov, S. A., Ng, K., Henkel, C., & Mookerjea, B. (2017) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stx1782 · Cited by 10 · see citing works
“Thus, from metal absorption-line spectra of quasars the variation in α was limited at a few 10−6 in the redshift range z ∼ 1 − 3 (Kotuš et al. 2017; Murphy et al. 2017; Evans et al. 2014; Molaro et al. 2013; Agafonova et al. 2011; Levshakov et al. 2006; Quast et al. 2004).”
BackgroundSelf-citationKonovalova, E. A., Demidov, Y. A., & Stolyarov, A. V. (2018) · Optics and Spectroscopy · doi:10.1134/s0030400x18100107 · Cited by 10 · see citing works
Nandy, D. K., & Sahoo, B. K. (2015) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stu2707 · Cited by 9 · see citing works
“…λz for the corresponding z value and by combining these values with the calculated q-parameters, it is possible to find out information about the subtle temporal variation in αe after the sensible consideration of the systematic uncertainties associated with the observation (Molaro et al. 2013).”
BackgroundFundamental physics with ESPRESSO: Constraining a simple parametrisation for varying α
da Fonseca, V., Barreiro, T., Nunes, N. J., Cristiani, S., Cupani, G., D’Odorico, V., Leite, A. C. O., Marques, C. M. J., Martins, C. J. A. P., Milaković, D., et al. (2022) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202243795 · Cited by 9 · see citing works
Self-citationTime variations of narrow absorption lines in high resolution quasar spectra
Boissé, P., Bergeron, J., Prochaska, J. X., Péroux, C., & York, D. G. (2015) · Springer Link (Chiba Institute of Technology) · doi:10.1051/0004-6361/201526289/pdf · Cited by 8 · see citing works
Barrow, J. D., & Magueijo, J. (2014) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.90.123506 · Cited by 8 · see citing works
New tests of variability of the speed of light.
Da̧browski, M. P., Salzano, V., Balcerzak, A., & Lazkoz, R. (2016) · EPJ Web of Conferences · doi:10.1051/epjconf/201612604012 · Cited by 8 · see citing works
Martins, C., Cristiani, S., Cupani, G., D'Odorico, V., Santos, R. G., Leite, A. C., Marques, C. M. J., Milakovic̀, D., Molaro, P., Murphy, M., et al. (2022) · Physical Review D · doi:10.1103/physrevd.105.123507 · Cited by 2 · see citing works
Self-citationFundamental cosmology from precision spectroscopy. II. Synergies with supernovae
Leite, A. C. O., & Martins, C. J. A. P. (2015) · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · doi:10.1103/physrevd.91.103519 · Cited by 7 · see citing works
Self-citationJiang, L.-H., Fu, S.-Q., Wang, F.-G., Bosman, S., Cai, Z., Jun, H., Pan, Z., Sun, F., Yang, J.-Y., & Zhang, H.-N. (2024) · Astrophysical Journal · doi:10.3847/1538-4357/adad5b · Cited by 4 · see citing works
“…and the strongest constraints on ∆ α/α (null re-sults) from this technique have reached an upper limit of several times 10 − 6 (e.g., King et al. 2012; Molaro et al. 2013; Songaila & Cowie 2014; Wilczynska et al. 2015; Kotuˇs et al. 2017; Milakovi´c et al. 2021; Murphy et al. 2022b; Lee et al.…”
On generalized theories of varying fine structure constant
Chakrabarti, S. (2022) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stac979 · Cited by 6 · see citing works
Spatial and temporal variations of the fine-structure constant in the Finslerian universe
Li, X., & Lin, H.-N. (2017) · Chinese Physics C · doi:10.1088/1674-1137/41/6/065102 · Cited by 6 · see citing works
Boas, J. M. V., Magano, D., Martins, C., Barbecho, A., & Serrano, C. (2020) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201937123 · Cited by 5 · see citing works
“Indeed there have been some recent indications of such a variation (Webb et al. 2011), at the relative level of variation of a few parts per million, though other measurements tightly constrain them (Molaro et al. 2013; Evans et al. 2014; Kotus et al. 2017).”
BackgroundSelf-citationBoas, J. V., Magano, D., Martins, C. J. A. P., Barbecho, A., & Serrano, C. (2020) · Springer Link (Chiba Institute of Technology) · doi:10.1051/0004-6361/201937123/pdf · Cited by 6 · see citing works
Self-citationCoupling quintessence kinetics to electromagnetism
Barros, B. J., & da Fonseca, V. (2022) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2023/06/048 · Cited by 6 · see citing works
- Authors
- Molaro, P., Centurión, M., Whitmore, J. B., Evans, T. M., Murphy, M. T., Agafonova, I. I., Bonifacio, P., D’Odorico, S., Levshakov, S. A., Lopez, S., Martins, C. J. A. P., Petitjean, P., Rahmani, H., Reimers, D., Srianand, R., Vladilo, G., & Wendt, M.
- Affiliations
- Universidade do Porto (PT)
- Trieste Astronomical Observatory (IT)
- Swinburne University of Technology (AU)
- Ioffe Institute (RU)
- Centre National de la Recherche Scientifique (FR)
- European Southern Observatory (DE)
- Saint Petersburg State Electrotechnical University (RU)
- Inter-University Centre for Astronomy and Astrophysics (IN)
- Universität Hamburg (DE)
- ORCID
- Venue
- Astronomy & Astrophysics
- Publisher
- EDP Sciences
- Published
- 2013-07
- Volume
- 555
- Pages
- A68
- ISSN
- 0004-6361 (ISSN-L)
- 1432-0746
- OpenAlex
- W1987305524
- Cited by
- 111
- References
- 38
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 3 · 2023: 1 · 2022: 6 · 2021: 3 · 2020: 6 · 2019: 6 · 2018: 6 · 2017: 15 · 2016: 19 · 2015: 16 · 2014: 20 · 2013: 5
- FWCI
- 10.80
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Astronomy and Astrophysics (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- HAL (submittedVersion)
- Americanae (AECID Library) (submittedVersion, other-oa)
- publish.UP (University of Potsdam) (submittedVersion)
- LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, other-oa)
- Oskar-Bordeaux (Universite de Bordeaux) (submittedVersion)
- Swinburne figshare (Swinburne University of Technology) (submittedVersion)
- Funders
- Deutsche Forschungsgemeinschaft (SFB 676, Teilprojekt C4)
- Agence Nationale de la Recherche (ANR-10-BLAN-0510, ANR-10)
- Indo-French Centre for the Promotion of Advanced Research
- Ministério da Ciência, Tecnologia e Ensino Superior
- Australian Research Council (DP110100866)
- Fundação para a Ciência e a Tecnologia (Ciência 2007, PTDC/FIS/111725/2009, PTDC/CTE-AST/098604/2008)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Keywords
- fine-structure constant variation, quasar absorption lines, fundamental physics tests
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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