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gr-qc2020
Perturbations in a Chaplygin gas Cosmology
Shambel Sahlu, Heba Sami, Anna-Mia Swart +3
In this paper we study the perturbations of a cosmic multi-fluid medium consisting of radiation, dust and a Chaplygin gas. To do so, we follow the 1 + 3 covariant formalism and der…
gr-qc2020★ 1 cited
Shear-free conditions of a Chaplygin-Gas-dominated universe
Amare Abebe, Mudhahir Al Ajmi, Maye Elmardi +2
In this work, we revisit the shear-free conjecture of general relativity and show the violation of the well-known shear-free condition for perfect-fluid spacetimes. It had been sho…