Variable Chaplygin Gas: Constraints from CMBR and SNe Ia
| dc.creator | Sethi, Geetanjali | |
| dc.creator | Singh, Sushil K. | |
| dc.creator | Kumar, Pranav | |
| dc.creator | Jain, Deepak | |
| dc.creator | Dev, Abha | |
| dc.date | 2005-08-23 | |
| dc.date | 2006-09-19 | |
| dc.date.accessioned | 2026-07-07T10:27:37Z | |
| dc.date.available | 2026-07-07T10:27:37Z | |
| dc.description | We constrain the parameters of the variable Chaplygin gas model, using the location of peaks of the CMBR spectrum and SNe Ia ``gold '' data set. Equation of state of the model is $P=-A(a)/ρ$, where $A(a)=A_0 a^{-n}$ is a positive function of the cosmological scale factor $a$, $A_0$ and $n$ being constants. The variable Chaplygin gas interpolates from dust-dominated era to quintessence dominated era. The model is found to be compatible with current type Ia Supernovae data and location of first peak if the values of $Ω_m$ and $n$ lie in the interval $[0.017,~0.117]$ and $[-1.3,~2.6]$ respectively. | |
| dc.description | 9 pages,4 figures | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0508491 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0508491 | |
| dc.identifier | Int.J.Mod.Phys.D15:1089-1098,2006 | |
| dc.identifier | doi:10.1142/S0218271806008644 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/177198 | |
| dc.subject | Astrophysics | |
| dc.title | Variable Chaplygin Gas: Constraints from CMBR and SNe Ia | |
| dc.type | text |