Are Chaplygin gases serious contenders for the dark energy
166 citations recorded by the source corpus.
We study the implications on both background and perturbation evolution of introducing a Chaplygin gas component in the universe's ingredients. We perform likelihood analyses using wide-ranging, SN1a, CMB and large scale structure observations to assess whether such a component could be a genuine alternative to a cosmological constant. We find that current data favors an adiabatic Chaplygin gas with behavior akin to a cosmological constant.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/df10214ba31473094331afc81bc2f9772e00af5e
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In Astronomy and Astrophysics
- A. Starobinsky
- V. Sahni
- Ujjaini Alam
- T. D. Saini
- Zong-hong Zhu
- Luca Amendola
- D. Carturan
- C. Burigana
In Nuclear and High Energy Physics
- A. Starobinsky
- Ujjaini Alam
- V. Sahni
- Zong-hong Zhu
- T. D. Saini
- Luca Amendola
- D. Carturan
- C. Burigana
Citations in the corpus
- Exploring the expanding Universe and dark energy using the statefinder diagnostic (2003, background): “This requires A ≫ B. Recent investigations which look at Chaplygin gas models in the light of galaxy clustering data and CMB anisotropies show that this observation is correct if the equation of state pc ∝ −1/ρc is assumed to be universally valid (Carturan & Finelli 2002; Sandvik et al. 2002; Bean &”
- Generalized Chaplygin gas as a unified scenario of dark matter/energy: Observational constraints (2004, methodology): “…2003; Makler et al. 2003b; Chen 2003a,b), the X-ray gas mass fraction of clusters (Cunha, Alcaniz and Lima 2004; Makler et al. 2003b), the large scale structure (Bilić et al. 2002; Bean and Dore 2003; Multamäki et al. 2004), and the age measurements of high-z objects (Alcaniz, Jain and Dev 2003).”
- WMAP and the generalized Chaplygin gas (2003, methodology): “The bound imposed by WMAP data on α is 5–10 stronger than the previous data (Bean & Dore 2003), and the Chaplygin gas (α = 1) is ruled out as a DE candidate at more than the 99.99% c.l.”