Phys. Rev. D 68, 023515 (2003) [8 pages]Are Chaplygin gases serious contenders for the dark energy?Received 20 January 2003; published 29 July 2003 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, Λ. We find that the current data favors behavior in an adiabatic Chaplygin gas that is akin to a cosmological constant. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.68.023515
DOI:
10.1103/PhysRevD.68.023515
PACS:
98.80.Es, 95.35.+d
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