The DOI matches its Crossref record; 46 of the 46 references it cites were found in a registry or an index.
Constraints on the Equation of State of Dark Energy and the Hubble Constant from Stellar Ages and the Cosmic Microwave Background
Open accessAbstract
We place constraints on the redshift-averaged, effective value of the equation of state of dark energy, w , using only the absolute ages of Galactic stars and the observed position of the first peak in the angular power spectrum of the cosmic microwave background (CMB). We find w < -0.8 at the 68% confidence level. If we further consider that w ≥ -1, this finding suggests that within our uncertainties, dark energy is indistinguishable from a classical vacuum energy term. We detect a correlation between the ages of the oldest galaxies and their redshift. This opens up the possibility of measuring w ( z ) by computing the relative ages of the oldest galaxies in the universe as a function of redshift, dz / dt . We show that this is a realistic possibility by computing dz / dt at z ~ 0 from Sloan Digital Sky Survey (SDSS) galaxies and obtain an independent estimate for the Hubble constant, H 0 = 69 ± 12 km s -1 Mpc -1 . The small number of galaxies considered at z > 0.2 does not yield, currently, a precise determination of w ( z ), but shows that the age-redshift relation is consistent with a standard ΛCDM universe with w = -1.
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Cites
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
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Measurements of Ω and Λ from 42 High‐Redshift Supernovae
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Self-citationCosmological Imprint of an Energy Component with General Equation of State
Caldwell, R. R., Dave, R., & Steinhardt, P. J. (1998) · Physical Review Letters · doi:10.1103/physrevlett.80.1582 · Cited by 3,694
Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
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Profiles of dark haloes: evolution, scatter and environment
Bullock, J. S., Kolatt, T. S., Sigad, Y., Somerville, R. S., Kravtsov, A. V., Klypin, A. A., Primack, J. R., & Dekel, A. (2001) · Monthly Notices of the Royal Astronomical Society · doi:10.1046/j.1365-8711.2001.04068.x · Cited by 2,319
The Keck Low-Resolution Imaging Spectrometer
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A Line-of-Sight Integration Approach to Cosmic Microwave Background Anisotropies
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Cosmology with a time-variable cosmological 'constant'
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Can the dark energy equation-of-state parameter w be less than−1?
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Cited by
Three‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Implications for Cosmology
Spergel, D. N., Bean, R., Dore, O., Nolta, M. R., Bennett, C. L., Dunkley, J., Hinshaw, G., Jarosik, N., Komatsu, E., Page, L., et al. (2007) · The Astrophysical Journal Supplement Series · doi:10.1086/513700 · Cited by 6,778
Self-citationNeutron-Capture Elements in the Early Galaxy
Sneden, C., Cowan, J. J., & Gallino, R. (2008) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.46.060407.145207 · Cited by 968
Two new diagnostics of dark energy
Sahni, V., Shafieloo, A., & Starobinsky, A. A. (2008) · Physical Review D · doi:10.1103/physrevd.78.103502 · Cited by 709
Age-dating luminous red galaxies observed with the Southern African Large Telescope
Ratsimbazafy, A. L., Loubser, S. I., Crawford, S. M., Cress, C. M., Bassett, B. A., Nichol, R. C., & Väisänen, P. (2017) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stx301 · Cited by 586
WMAP constraints on low redshift evolution of dark energy
Jassal, H. K., Bagla, J. S., & Padmanabhan, T. (2005) · Monthly Notices of the Royal Astronomical Society: Letters · doi:10.1111/j.1745-3933.2005.08577.x · Cited by 400
Metadata
- Authors
- Jimenez, R., Verde, L., Treu, T., & Stern, D.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2003-08-20
- Volume
- 593
- Issue
- 2
- Pages
- 622-629
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W1717808836
- Cited by
- 506
- References
- 46
- FWCI
- 4.64
- Type
- journal article
- Language
- en
- Open access
- bronze
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