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Indexed by:期刊论文

Date of Publication:2014-10-07

Journal:PHYSICS LETTERS B

Included Journals:SCIE、Scopus

Volume:737

Page Number:244-247

ISSN No.:0370-2693

Abstract:In this paper, we study a cosmological model in general relativity within the framework of spatially flat Friedmann-Robertson-Walker space-time filled with ordinary matter (baryonic), radiation, dark matter and dark energy, where the latter two components are described by Chevallier-Polarski-Linder equation of state parameters. We utilize the observational data sets from SNLS3, BAO and Planck + WMAP9 + WiggleZ measurements of matter power spectrum to constrain the model parameters. We find that the current observational data offer tight constraints on the equation of state parameter of dark matter. We consider the perturbations and study the behavior of dark matter by observing its effects on CMB and matter power spectra. We find that the current observational data favor the cold dark matter scenario with the cosmological constant type dark energy at the present epoch. (C) 2014 The Authors. Published by Elsevier B.V.