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

الأصل · EN

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 Ωc >0.55 and an equation of state w <-0.6 at 95% c.l.. We also investigate the recently proposed Silent Chaplygin models, constraining Ωc >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.