https://doi.org/10.1140/epjc/s10052-012-1912-6
Regular Article - Theoretical Physics
Accretion of new variable modified Chaplygin gas and generalized cosmic Chaplygin gas onto Schwarzschild and Kerr–Newman black holes
Department of Mathematics, Bengal Engineering and Science University, Shibpur, Howrah, 711 103, India
* e-mail: ujjaldebnath@yahoo.com
** e-mail: ujjal@iucaa.ernet.in
Received:
17
January
2012
Revised:
11
February
2012
Published online:
17
March
2012
In this work, we have studied accretion of the dark energies in new variable modified Chaplygin gas (NVMCG) and generalized cosmic Chaplygin gas (GCCG) models onto Schwarzschild and Kerr–Newman black holes. We find the expression of the critical four velocity component which gradually decreases for the fluid flow towards the Schwarzschild as well as the Kerr–Newman black hole. We also find the expression for the change of mass of the black hole in both cases. For the Kerr–Newman black hole, which is rotating and charged, we calculate the specific angular momentum and total angular momentum. We showed that in both cases, due to accretion of dark energy, the mass of the black hole increases and angular momentum increases in the case of a Kerr–Newman black hole.
© Springer-Verlag / Società Italiana di Fisica, 2012
