Barotropic FRW cosmologies with Chiellini damping in comoving time

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.

arXiv comment4 pages, version accepted at MPLA

References in corpus (4)

• Aetherizing Lambda: Barotropic Fluids as Dark Energy
• Friedman vs Abel equations: A connection unraveled
• Barotropic FRW cosmologies with Chiellini damping
• Dark Energy Scaling from Dark Matter to Acceleration

Cited by in corpus (2)

• Visco-elastic Cosmology for a Sparkling Universe?
• On the integrability of the Abel and of the extended Liénard equations