Late time acceleration in Brans-Dicke cosmology

S. Sen and A. A. Sen
Phys. Rev. D 63, 124006 – Published 8 May 2001
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Abstract

In this work we investigate the possibility of having a late time accelerated phase of the universe, suggested by recent supernova observation, in the context of Brans-Dicke theory with a potential having a time dependent mass squared term which has recently become negative and a matter field. We find that while a perfect fluid (pressureless and with pressure) cannot support this acceleration, a fluid with dissipative pressure can drive this late time acceleration for a simple power-law expansion of the universe. We have also calculated some cosmological parameters in our model to match with observations.

  • Received 25 October 2000

DOI:https://doi.org/10.1103/PhysRevD.63.124006

©2001 American Physical Society

Authors & Affiliations

S. Sen* and A. A. Sen

  • Harish Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad 211 019, India

  • *Electronic address: somasri@mri.ernet.in
  • Electronic address: anjan@mri.ernet.in

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Issue

Vol. 63, Iss. 12 — 15 June 2001

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