Dark energy with polytropic equation of state
| dc.creator | Mukhopadhyay, Utpal | |
| dc.creator | Ray, Saibal | |
| dc.date | 2005-10-19 | |
| dc.date.accessioned | 2026-07-07T12:39:57Z | |
| dc.date.available | 2026-07-07T12:39:57Z | |
| dc.description | Equation of state parameter plays a significant role for guessing the real nature of dark energy. In the present paper polytropic equation of state $p=ωρ^n$ is chosen for some of the kinematical $Λ$-models viz., $Λ\sim (\dot a/a)^2$, $Λ\sim \ddot a/a$ and $Λ\sim ρ$. Although in dust cases ($ω=0$) closed form solutions show no dependency on the polytropic index $n$, but in non-dust situations some new possibilities are opened up including phantom energy with supernegative ($ω<-1$) equation of state parameter. | |
| dc.description | Latex, 6 pages | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0510550 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0510550 | |
| dc.identifier | Mod.Phys.Lett.A23:3187-3198,2008 | |
| dc.identifier | doi:10.1142/S0217732308028533 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/219303 | |
| dc.subject | Astrophysics | |
| dc.title | Dark energy with polytropic equation of state | |
| dc.type | text |