Constraining a double component dark energy model using type Ia supernovae data
arXiv:astro-ph/0606171 · doi:10.1016/j.physleta.2007.03.094
Abstract
A two-component fluid representing dark energy is studied. One of the components has a polytropic form, while the other has a barotropic form. Exact solutions are obtained and the cosmological parameters are constrained using supernova type Ia data. In general, an open universe is predicted. A big rip scenario is largely preferred, but the dispersion in the parameter space is very high. Hence, even if scenarios without future singularities can not be excluded with the allowed range of parameters, a phantom cosmology, with an open spatial section, is a general prediction of the model. For a wide range of the equation of state parameters there is an asymptotic de Sitter phase.
Latex file, 13 pages, 16 eps figures, changed content and added references
References in corpus (6)
- Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
- The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set
- Role of Modified Chaplygin Gas in Accelerated Universe
- Cosmological constraints on the dark energy equation of state and its evolution
- Bayesian Analysis of the (Generalized) Chaplygin Gas and Cosmological Constant Models using the 157 gold SNe Ia Data
- Bayesian Statistics and Parameter Constraints on the Generalized Chaplygin Gas Model using SNe Ia Data
Cited by in corpus (5)
- Constraints on Exotic Matter for An Emergent Universe
- Scalar Field Dark Energy Perturbations and their Scale Dependence
- Emergent Universe from A Composition of Matter, Exotic Matter and Dark Energy
- Observational Constraints on the Model Parameters of a Class of Emergent Universe
- On Distinguishing Different Models of a Class of Emergent Universe Solutions