| Issue |
A&A
Volume 368, Number 1, March II 2001
|
|
|---|---|---|
| Page(s) | 325 - 334 | |
| Section | Astronomical instrumentation | |
| DOI | https://doi.org/10.1051/0004-6361:20000525 | |
| Published online | 15 March 2001 | |
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, chan@hobby.astro.umass.edu
Received:
15
November
2000
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
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