Artículos de revistas
Consistency of the mass variation formula for black holes accreting cosmological fluids
Fecha
2012-04-02Registro en:
GENERAL RELATIVITY AND GRAVITATION, NEW YORK, v. 44, n. 4, pp. 985-992, APR, 2012
0001-7701
10.1007/s10714-011-1318-z
Autor
Guariento, Daniel C.
Horvath, J. E.
Institución
Resumen
We address the spherical accretion of generic fluids onto black holes. We show that, if the black hole metric satisfies certain conditions, in the presence of a test fluid it is possible to derive a fully relativistic prescription for the black hole mass variation. Although the resulting equation may seem obvious due to a form of it appearing as a step in the derivation of the Schwarzschild metric, this geometrical argument is necessary to fix the added degree of freedom one gets for allowing the mass to vary with time. This result has applications on cosmological accretion models and provides a derivation from first principles to serve as a basis to the accretion equations already in use in the literature.