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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/015/01/0053-0063

    • Keywords

       

      Star clusters; general relativity; redshift; Fermigas equation; field equations

    • Abstract

       

      Collisionless star clusters in dynamical equilibrium are of current interest in general relativity and astrophysics. A step-function distribution is chosen for star clusters. The corresponding equation of state is analogous to a Fermi-gas equation. These clusters are found to be pulsationally unstable for a central redshift ofZc ⩾ 0·54. Further, a model of clusters is developed in which the core has an extremely relativistic equation of state. These structures are unstable forZc ⩾ 2·55 when we use Chandrasekhar’s technique to study their pulsational stability.

    • Author Affiliations

       

      M C Durgapal1 P S Rawat1 R Banerji1

      1. Department of Physics, Kumaun University, Naini Tal - 263 002, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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