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LOOKING BEYOND LAMBDA WITH THE UNION SUPERNOVA COMPILATION
- Source :
- The Astrophysical Journal, vol 695, iss 1, The Astrophysical Journal, The Astrophysical Journal, 2009, 695, pp.391-403. ⟨10.1088/0004-637X/695/1/391⟩, The Astrophysical Journal, American Astronomical Society, 2009, 695, pp.391-403. ⟨10.1088/0004-637X/695/1/391⟩, Astrophysical Journal, vol 695, iss 1, The Astrophysical Journal, American Astronomical Society, 2009, 695, pp.391. ⟨10.1088/0004-637X/695/1/391⟩, Rubin, D; Linder, EV; Kowalski, M; Aldering, G; Amanullah, R; Barbary, K; et al.(2009). Looking beyond lambda with the union supernova compilation. Astrophysical Journal, 695(1), 391-403. doi: 10.1088/0004-637X/695/1/391. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/3xr6s8h4, The Astrophysical Journal, 2009, 695, pp.391. ⟨10.1088/0004-637X/695/1/391⟩
- Publication Year :
- 2009
- Publisher :
- eScholarship, University of California, 2009.
-
Abstract
- The recent robust and homogeneous analysis of the world's supernova distance-redshift data, together with cosmic microwave background and baryon acoustic oscillation data, provides a powerful tool for constraining cosmological models. Here we examine particular classes of scalar field, modified gravity, and phenomenological models to assess whether they are consistent with observations even when their behavior deviates from the cosmological constant Lambda. Some models have tension with the data, while others survive only by approaching the cosmological constant, and a couple are statistically favored over LCDM. Dark energy described by two equation of state parameters has considerable phase space to avoid Lambda and next generation data will be required to constrain such physics.<br />Comment: 32 pages, 19 figures
- Subjects :
- [SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
Cosmic microwave background
FOS: Physical sciences
Cosmological constant
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astronomy & Astrophysics
Lambda
01 natural sciences
Atomic
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
General Relativity and Quantum Cosmology
Particle and Plasma Physics
supernovae: general
astro-ph
cosmology: theory
0103 physical sciences
Nuclear
010303 astronomy & astrophysics
Physics
theory [cosmology]
010308 nuclear & particles physics
Equation of state (cosmology)
Astrophysics (astro-ph)
Molecular
Astronomy and Astrophysics
observations [cosmology]
Baryon
Supernova
Space and Planetary Science
cosmology: observations
Dark energy
Scalar field
general [supernovae]
Astronomical and Space Sciences
Physical Chemistry (incl. Structural)
Subjects
Details
- ISSN :
- 0004637X and 15384357
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal, vol 695, iss 1, The Astrophysical Journal, The Astrophysical Journal, 2009, 695, pp.391-403. ⟨10.1088/0004-637X/695/1/391⟩, The Astrophysical Journal, American Astronomical Society, 2009, 695, pp.391-403. ⟨10.1088/0004-637X/695/1/391⟩, Astrophysical Journal, vol 695, iss 1, The Astrophysical Journal, American Astronomical Society, 2009, 695, pp.391. ⟨10.1088/0004-637X/695/1/391⟩, Rubin, D; Linder, EV; Kowalski, M; Aldering, G; Amanullah, R; Barbary, K; et al.(2009). Looking beyond lambda with the union supernova compilation. Astrophysical Journal, 695(1), 391-403. doi: 10.1088/0004-637X/695/1/391. Lawrence Berkeley National Laboratory: Retrieved from: http://www.escholarship.org/uc/item/3xr6s8h4, The Astrophysical Journal, 2009, 695, pp.391. ⟨10.1088/0004-637X/695/1/391⟩
- Accession number :
- edsair.doi.dedup.....ec27b9741ed0496777e7e5da278dc4b7
- Full Text :
- https://doi.org/10.1088/0004-637X/695/1/391⟩