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

TL;DR

This paper uses recent Integrated Sachs-Wolfe effect data to constrain generalized and Silent Chaplygin gas dark energy models, providing bounds on their parameters and discussing future observational prospects.

Contribution

It offers new observational constraints on Chaplygin gas models using ISW data and discusses the potential of future surveys to improve these constraints.

Findings

Generalized Chaplygin gas must have $ ho_c >0.55$ and $w <-0.6$ at 95% c.l.

Silent Chaplygin models require $ ho_c >0.55$ and $w <-0.65$ at 95% c.l.

Future deep redshift surveys will enhance constraints on dark energy models.

Abstract

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.