• Non-adiabatic radiative collapse of a relativistic star under different initial conditions

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      https://www.ias.ac.in/article/fulltext/pram/079/03/0501-0509

    • Keywords

       

      Gravitational collapse; Einstein’s field equations; spheroidal geometry; relativistic star.

    • Abstract

       

      We examine the role of space-time geometry in the non-adiabatic collapse of a star dissipating energy in the form of radial heat flow, studying its evolution under different initial conditions. The collapse of a star filled with a homogeneous perfect fluid is compared with that of a star filled with inhomogeneous imperfect fluid under anisotropic pressure. Both the configurations are spherically symmetric. However, in the latter case, the physical space 𝑡 = constant of the configurations endowed with spheroidal or pseudospheroidal geometry is assumed to be inhomogeneous. It is observed that as long as the collapse is shear-free, its evolution depends only on the mass and size of the star at the onset of collapse.

    • Author Affiliations

       

      Ranjan Sharma1 Ramesh Tikekar2

      1. Department of Physics, P.D. Women’s College, Jalpaiguri 735 101, India
      2. Department of Mathematics, Sardar Patel University, Vallabh Vidyanagar 388 120, India
    • Dates

       
  • Pramana – Journal of Physics | News

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