Chaplygin gas in light of recent Integrated Sachs--Wolfe effect data

Details Chaplygin gas in light of recent Integrated Sachs--Wolfe effect data Chaplygin gas in light of recent Integrated Sachs--Wolfe effect data

2006-06-07

arxiv.org/abs/gr-qc/0606030v1

Class.Quant.Grav. 23 (2006) 4125-4132

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, 4 figures

Scientific paper

10.1088/0264-9381/23/12/009

We investigate the possibility of constraining Chaplygin dark energy models with current Integrated Sachs Wolfe effect data. In the case of a flat universe we found that generalized Chaplygin gas models must have an energy density such that $\Omega_c >0.55$ and an equation of state $w <-0.6$ at 95% c.l.. We also investigate the recently proposed Silent Chaplygin models, constraining $\Omega_c >0.55$ and $w <-0.65$ at 95% c.l.. Better measurements of the CMB-LSS correlation will be possible with the next generation of deep redshift surveys. This will provide independent and complementary constraints on unified dark energy models such as the Chaplygin gas.

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