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Cited by 451

The DOI matches its Crossref record; 92 of the 92 references it cites were found in a registry or an index.

Cosmic Concordance and Quintessence

Open access
Wang, Limin, Caldwell, R. R., Ostriker, J. P., Steinhardt, Paul J.·2000·The Astrophysical Journal
DOI 10.1086/308331
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Abstract

We present a comprehensive study of the observational constraints on spatially flat cosmological models containing a mixture of matter and quintessence—a time-varying, spatially inhomogeneous component of the energy density of the universe with negative pressure. Our study also includes the limiting case of a cosmological constant. We classify the observational constraints by redshift: low-redshift constraints include the Hubble parameter, baryon fraction, cluster abundance, the age of the universe, bulk velocity and the shape of the mass power spectrum; intermediate-redshift constraints are due to probes of the redshift-luminosity distance based on Type Ia supernovae, gravitational lensing, the Lyα forest, and the evolution of large-scale structure; high-redshift constraints are based on measurements of the cosmic microwave background temperature anisotropy. Mindful of systematic errors, we adopt a conservative approach in applying these observational constraints. We determine that the range of quintessence models in which the ratio of the matter density to the critical density is 0.2 ≲ Ω m ≲ 0.5, and the effective, density-averaged equation of state is -1 ≤ w ≲ -0.2, is consistent with the most reliable, current low-redshift and microwave background observations at the 2 σ level. Factoring in the constraint due to the recent measurements of Type Ia supernovae, the range for the equation of state is reduced to -1 ≤ w ≲ -0.4, where this range represents models consistent with each observational constraint at the 2 σ level or better (concordance analysis). A combined maximum likelihood analysis suggests a smaller range, -1 ≤ w ≲ -0.6. We find that the best-fit and best-motivated quintessence models lie near Ω m ≈ 0.33, h ≈ 0.65, and spectral index n s = 1, with an effective equation of state w ≈ -0.65 for "tracker" quintessence and w = -1 for "creeper" quintessence.

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Metadata

Authors
Wang, L., Caldwell, R. R., Ostriker, J. P., & Steinhardt, P. J.
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2000-02-10
Volume
530
Issue
1
Pages
17-35
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1086/308331
OpenAlex
W2055532382
Cited by
451
References
92
FWCI
47.42
Type
journal article
Language
en
Open access
bronze

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