Cosmology with a time-variable cosmological 'constant'
Abstract
If the potential V(φ) of the scalar field that drove inflation had a power-law tail at large φ, V ~ φ^{-aplpha}^, the mass density, ρphi_, associated with φ would act like a cosmological constant that decreases with time less rapidly than the mass densities of matter and radiation. If ρphi_ were appreciable at the present epoch it could help reconcile the low dynamical estimates of the mean mass density with the negligibly small space curvature preferred by inflation.
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The cosmological constant problem
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- Authors
- Peebles, P. J. E., & Ratra, B.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1988-02
- Volume
- 325
- Pages
- L17
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2003686608
- Cited by
- 1,720
- References
- 0
- Citations by year
- 2026: 32 · 2025: 62 · 2024: 70 · 2023: 57 · 2022: 62 · 2021: 78 · 2020: 50 · 2019: 60 · 2018: 58 · 2017: 45 · 2016: 49 · 2015: 41 · 2014: 73 · 2013: 64 · 2012: 66
- FWCI
- 7.30
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Astrophysical Journal (publishedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
- Physical Sciences › Physics and Astronomy › Statistical and Nonlinear Physics › Noncommutative and Quantum Gravity Theories
- Keywords
- time-varying cosmological constant, scalar field inflation, power-law potential, space curvature, dark energy
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