• Anisotropic Bianchi-I universe with phantom field and cosmological constant

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/071/06/1247-1257

    • Keywords

       

      Anisotropic cosmology; phantom field; accelerating universe.

    • Abstract

       

      We study an anisotropic Bianchi-I universe in the presence of a phantom field and a cosmological constant. Cosmological solutions are obtained when the kinetic energy of the phantom field is of the order of anisotropy and dominates over the potential energy of the field. The anisotropy of the universe decreases and the universe transits to an isotropic flat FRW universe accommodating the present acceleration. A class of new cosmological solutions is obtained for an anisotropic universe in case an initial anisotropy exists which is bigger than the value determined by the parameter of the kinetic part of the field. Later, an autonomous system of equations for an axially symmetric Bianchi-I universe with phantom field in an exponential potential is studied. We discuss the stability of the cosmological solutions.

    • Author Affiliations

       

      Bikash Chandra Paul1 Dilip Paul1 2

      1. Department of Physics, North Bengal University, Siliguri, Dist. Darjeeling 734 013, India
      2. Permanent address: Khoribari High School (H.S.), Khoribari, Dist., Darjeeling 734 427,
    • Dates

       
  • Pramana – Journal of Physics | News

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