Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2002-04-30
Class.Quant.Grav. 19 (2002) 3179-3206
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
21pages. Accepted for publication in Class. Quntum Grav
Scientific paper
10.1088/0264-9381/19/12/306
The Hawking radiation forms the essential basis of the black hole thermodynamics. The black hole thermodynamics denotes a nice correspondence between black hole kinematics and the laws of ordinary thermodynamics, but has been so far considered only in an asymptotically flat case. Does such the correspondence rely strongly on the feature of the gravity vanishing at the infinity? In order to resolve this question, it should be considered for the first to extend the Hawking radiation to a case with a dynamical boundary condition like an expanding universe. Therefore the Hawking radiation in an expanding universe is discussed in this paper. As a concrete model of a black hole in an expanding universe, we use the swiss cheese universe which is the spacetime including a Schwarzschild black hole in the Friedmann-Robertson-Walker universe. Further for simplicity, our calculation is performed in two dimension. The resultant spectrum of the Hawking radiation measured by a comoving observer is generally different from a thermal one. We find that the qualitative behavior of the non-thermal spectrum is of dumping oscillation as a function of the frequency measured by the observer, and that the intensity of the Hawking radiation is enhanced by the presence of a cosmological expansion. It is appropriate to say that it a black hole with an asymptotically flat boundary condition stays in a lowest energy thermal equilibrium state, and that, once a black hole is put into an expanding universe, it is excited to a non-equilibrium state and emits its mass energy with stronger intensity than a thermal one.
No associations
LandOfFree
Hawking Radiation in the Swiss Cheese Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Hawking Radiation in the Swiss Cheese Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hawking Radiation in the Swiss Cheese Universe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-626076