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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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“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
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“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×
“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×
“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 365 · cited 1×
“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 346 · cited 4×
“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×
“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×
“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).”
BackgroundMethod
Research works printed but not linked: 1
- King, 2009, Mem. Soc. Astron. It., 80, 864
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Pepe, F. A., Cristiani, S., Rebolo, R., Santos, N. C., Dekker, H., Cabral, A., Marcantonio, P. D., Figueira, P., Curto, G. L., Lovis, C., et al. (2020) · Astronomy and Astrophysics · doi:10.1051/0004-6361/202038306 · Cited by 596
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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 668
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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
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
“…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
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
“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
“…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
“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
“…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 77
Kotuš, S., Murphy, M. T., & Carswell, R. F. (2016) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stw2543 · Cited by 71
“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
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 57
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
“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
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
“…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
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 66
Anisotropy of the Universe via the Pantheon supernovae sample revisited
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“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
Self-citationSongaila, A., & Cowie, L. L. (2014) · The Astrophysical Journal · doi:10.1088/0004-637x/793/2/103 · Cited by 48
“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
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
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
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
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
“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
Self-citationSongaila, A., & Cowie, L. L. (2016) · Cited by 39
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
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 32
Said, J. L., Mifsud, J., Parkinson, D., Saridakis, E. N., Sultana, J., & Adami, K. Z. (2020) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2020/11/047 · Cited by 33
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
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
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
“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 32
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
Self-citationLimits on the spatial variations of the electron-to-proton mass ratio in the Galactic plane
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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
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 26
“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
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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 29
“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. J., Alcaniz, J. S., & Holanda, R. F. L. (2020) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2020/06/036 · Cited by 28
Varying electric charge in multiscale spacetimes
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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
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
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
“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
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
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 21
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
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
Probing the constancy of the speed of light with future galaxy survey: The case of SKA and Euclid
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Galaxy clusters, type Ia supernovae and the fine structure constant
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“…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
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
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
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
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
“…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 16
“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
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 15
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
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
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
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
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
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
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
“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. M., Crump, J. H., Baker, E., Hart, L., Grin, D., Brosius, M., & Chluba, J. (2024) · Physical review. D/Physical review. D. · doi:10.1103/physrevd.109.103529 · Cited by 13
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
Self-citationBergeron, J., & Boissé, P. (2017) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201730906 · Cited by 12
“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
Self-citationVarying Constants Entropic-ΛCDM Cosmology
Da̧browski, M., Gohar, H., & Salzano, V. (2016) · Entropy · doi:10.3390/e18020060 · Cited by 12
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
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
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
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
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
“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
“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
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
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
“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
Nandy, D. K., & Sahoo, B. K. (2015) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stu2707 · Cited by 9
“…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
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
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
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 6
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
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
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
“…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 7
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
Boas, J. M. V., Magano, D., Martins, C., Barbecho, A., & Serrano, C. (2020) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201937123 · Cited by 5
“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
Self-citationCoupling quintessence kinetics to electromagnetism
Barros, B. J., & da Fonseca, V. (2023) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2023/06/048 · Cited by 7
Metadata
- 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
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