Barotropic FRW cosmologies with Chiellini damping in comoving time
arXiv:1502.07033 · doi:10.1142/S021773231550100x
Abstract
For non-zero cosmological constant Lambda, we show that the barotropic FRW cosmologies as worked out in the comoving time lead in the radiation-dominated case to scale factors of identical form as for the Chiellini dissipative scale factors in conformal time obtained recently by us in Phys. Lett. A 379 (2015) 882-887. This is due to the Ermakov equation which is obtained in this case. For zero cosmological constant, several textbook solutions are provided as particular cases of Lambda different from zero.
4 pages, version accepted at MPLA