Search Publications

Probing a steep EoS for dark energy with latest observations

Jaber, Mariana; Macorra, Axel de la

We present a parametrization for the Dark Energy Equation of State "EoS" which has a rich structure, performing a transition at pivotal redshift z_T between the present day value w₀ to an early time w_i =w_a +w₀ ≡ w(z ≫ 0) with a steepness given in terms of q parameter. The proposed parametrizati…

On the concordance of cosmological data in the case of the generalized Chaplygin gas

Aurich, R.; Lustig, S.

The generalized Chaplygin gas cosmology provides a prime example for the class of unified dark matter models, which substitute the two dark components of the standard cosmological ΛCDM concordance model by a single dark component. The equation of state of the generalized Chaplygin gas is characterised by a parameter α such that the standard ΛCDM m…