TY  - JOUR
AU  - Martinez-Asencio, J.
AU  - Olmo, G. J.
AU  - Rubiera-Garcia, D.
PY  - 2012
DA  - 2012//
TI  - Black hole formation from a null fluid in extended Palatini gravity
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 104010
EP  - 8pp
VL  - 86
IS  - 10
PB  - Amer Physical Soc
AB  - We study the formation and perturbation of black holes by null fluxes of neutral matter in a quadratic extension of general relativity formulated a la Palatini. Working in a spherically symmetric space-time, we obtain an exact analytical solution for the metric that extends the usual Vaidya-type solution to this type of theory. We find that the resulting space-time is formally that of a Reissner-Nordstrom black hole but with an effective charge term carrying the wrong sign in front of it. This effective charge is directly related to the luminosity function of the radiation stream. When the ingoing flux vanishes, the charge term disappears and the space-time relaxes to that of a Schwarzschild black hole. We provide two examples that illustrate the formation of a black hole from Minkowski space and the perturbation by a finite pulse of radiation of an existing Schwarzschild black hole.
SN  - 1550-7998
UR  - http://arxiv.org/abs/arXiv:1209.3371
UR  - https://doi.org/10.1103/PhysRevD.86.104010
DO  - 10.1103/PhysRevD.86.104010
LA  - English
N1  - WOS:000310686900007
ID  - Martinez-Asencio_etal2012
ER  -