Radiating gravitational collapse with shearing motion and bulk viscosity
Observatório Nacional, Rua Ganeral José Cristino 77, São Cristóvão, CEP 20921-400, Rio de Janeiro, Brazil
Corresponding author: R. Chan, firstname.lastname@example.org
Accepted: 14 December 2000
A model is proposed of a collapsing radiating star consisting of a shearing fluid with bulk viscosity undergoing radial heat flow with outgoing radiation. The pressure of the star, at the beginning of the collapse, is isotropic but due to the presence of the bulk viscosity the pressure becomes more and more anisotropic. The behavior of the density, pressure, mass, luminosity, the effective adiabatic index and the Kretschmann scalar is analyzed. Our work is compared to the case of a collapsing shearing fluid of a previous model, for a star with 6 .
Key words: black hole physics / dense matter / gravitation / relativity / radiation mechanism, thermal
© ESO, 2001