Variable Chaplygin Gas: Constraints from CMBR and SNe Ia

Abstract

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 $P=-A(a)/\rho$, 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 ${\Omega }_m$ and $n$ lie in the interval $[0.017,0.117]$ and $[-1.3,2.6]$ respectively.

9 pages,4 figures

References in corpus (28)

• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• Cosmological Constant - the Weight of the Vacuum
• The Case for a Positive Cosmological Lambda-term
• Cosmology and the Fate of Dilatation Symmetry
• An alternative to quintessence
• Generalized Chaplygin Gas, Accelerated Expansion and Dark Energy-Matter Unification
• Cosmological Tracking Solutions
• Unification of Dark Matter and Dark Energy: the Inhomogeneous Chaplygin Gas
• Can the Chaplygin gas be a plausible model for dark energy?
• The end of unified dark matter?
• WMAP constraints on low redshift evolution of dark energy
• Generalized Chaplygin gas and CMBR constraints
• Constraints on the generalized Chaplygin gas from supernovae observations
• Density perturbations in an Universe dominated by the Chaplygin gas
• Cosmological consequences of a Chaplygin gas dark energy
• CMB Observables and Their Cosmological Implications
• Are Chaplygin gases serious contenders to the dark energy throne?
• Generalized Chaplygin gas as a unified scenario of dark matter/energy: observational constraints
• Cosmological Effects of a Class of Fluid Dark Energy Models
• High-redshift objects and the generalized Chaplygin gas
• Quintessence and the Separation of CMB Peaks
• A Two-Field Quintessence Model
• The Location of CMB Peaks in a Universe with Dark Energy
• Supernova constraints on alternative models to dark energy
• Constraining Evolution of Quintessence with CMB and SNIa Data
• Constraints on alternative models to dark energy
• Bound on the time variation of the fine structure constant driven by quintessence

Cited by in corpus (17)

• Linear and nonlinear interactions in the dark sector
• AIC and BIC for cosmological interacting scenarios
• A New Variable Modified Chaplygin Gas Model Interacting with Scalar Field
• Viability of Variable Generalised Chaplygin gas - a thermodynamical approach
• Density Evolution in the New Modified Chaplygin Gas Model
• On sign-changeable interaction in FLRW cosmology
• Constraining H0 in General Dark Energy Models from Sunyaev-Zeldovich/X-ray Technique and Complementary Probes
• Gravitational Collapse in Higher Dimensional Husain Space-Time
• Baryonic matter perturbations in decaying vacuum cosmology
• Limits from Weak Gravity Conjecture on Dark Energy Models
• Thermodynamical behaviour of the Variable Chaplygin gas
• Variable Chaplygin Gas: Constraints from Supernovae, GRB and Gravitational Wave Merger Events
• Friedmann-Robertson-Walker Models with Late-Time Acceleration
• Accelerating Universe in Higher Dimensional Space Time : an alternative approach
• Variable Modified Chaplygin Gas in Anisotropic Universe with Kaluza-Klein Metric
• An Alternative Approach to the Exact Solution of FRW-Type Spacetime with a Generalized Chaplygin Gas
• Emergent Universe Scenario in the Modified Chaplygin gas : Towards an Exact Solution and Observational Constraints