Article
Barotropic FRW Cosmologies with Chiellini Damping
Physics Letters A
(2015)
Abstract
It is known that barotropic FRW equations written in the conformal time variable can be reduced to simple linear equations for an exponential function involving the conformal Hubble rate. Here, we show that an interesting class of barotropic universes can be obtained in the linear limit of a special type of nonlinear dissipative Ermakov–Pinney equations with the nonlinear dissipation built from Chiellini's integrability condition. These cosmologies, which evolutionary are similar to the standard ones, correspond to barotropic fluids with adiabatic indices rescaled by a particular factor and have amplitudes of the scale factors inverse proportional to the adiabatic index.
Disciplines
Publication Date
May 8, 2015
DOI
https://doi.org/10.1016/j.physleta.2015.01.001
Citation Information
S.C. Mancas. "Barotropic FRW Cosmologies with Chiellini Damping" Physics Letters A Vol. 379 Iss. 10-11 (2015) p. 882 - 887 Available at: http://works.bepress.com/stefani_mancas/105/