Wednesday, May 8, 2013

1305.1416 (Petarpa Boonserm et al.)

Regge-Wheeler equation, stability, and greybody factors for dirty black
holes
   [PDF]

Petarpa Boonserm, Tritos Ngampitipan, Matt Visser
So-called "dirty" black holes are surrounded by non-zero stress-energy, rather than vacuum. The presence of the non-zero stress-energy modifies key features such as the surface gravity, the Regge-Wheeler equation, stability, and the greybody factors in a rather nontrivial way. We shall present general forms for the Regge-Wheeler equation for spin 0, spin 1, and for spin 2 axial perturbations in arbitrary static spherically symmetric spacetimes. Using very general features of these spacetimes, (in particular the classical energy conditions for the stress-energy surrounding the black hole), we extract several interesting and robust bounds on the behaviour of such systems, including rigorous bounds on the greybody factors for dirty black holes.
View original: http://arxiv.org/abs/1305.1416

No comments:

Post a Comment