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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/074/03/L0481-L0489

    • Keywords

       

      Cosmology; acceleration of the Universe; chameleon field.

    • Abstract

       

      In the present work, it is shown that a chameleon scalar field having a non-minimal coupling with dark matter can give rise to a smooth transition from a decelerated to an accelerated phase of expansion for the Universe. It is surprising to note that the coupling with the chameleon scalar field hardly affects the evolution of the dark matter sector, which still redshifts as $a^{−3}$.

    • Author Affiliations

       

      Narayan Banerjee1 Sudipta Das2 Koyel Ganguly3

      1. IISER-Kolkata, Mohanpur Campus, P.O. BCKV Main Office, District Nadia 741 252, India
      2. Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad 211 019, India
      3. Department of Physics, Relativity and Cosmology Research Centre, Jadavpur University, Kolkata 700 032, India

    • Dates

       
      Published
      March 2010
      Manuscript received
      22 December 2009
      Manuscript revised
      3 February 2010
      Accepted
      11 February 2010

  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

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