Dilatonic Black Holes with Gauss-Bonnet Term

Details Dilatonic Black Holes with Gauss-Bonnet Term Dilatonic Black Holes with Gauss-Bonnet Term

1996-06-17

arxiv.org/abs/gr-qc/9606034v2

Phys.Rev.D55:739-753,1997

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

31pages, 11figures, LaTex style

Scientific paper

10.1103/PhysRevD.55.739

We discuss black holes in an effective theory derived from a superstring model, which includes a dilaton field, a gauge field and the Gauss-Bonnet term. Assuming U(1) or SU(2) symmetry for the gauge field, we find four types of spherically symmetric solutions, i.e., a neutral, an electrically charged, a magnetically charged and a ``colored'' black hole, and discuss their thermodynamical properties and fate via the Hawking evaporation process. For neutral and electrically charged black holes, we find critical point and a singular end point. Below the mass corresponding to the critical point, nosolution exists, while the curvature on the horizon diverges and anaked singularity appears at the singular point. A cusp structure in the mass-entropy diagram is found at the critical point and black holes on the branch between the critical and singular points become unstable. For magnetically charged and ``colored" black holes, the solution becomes singular just at the end point with a finite mass. Because the black hole temperature is always finite even at the critical point or the singular point, we may conclude that the evaporation process will not be stopped even at the critical point or the singular point, and the black hole will move to a dynamical evaporation phase or a naked singularity will appear.

Affiliated with

Also associated with

No associations

Rating

Dilatonic Black Holes with Gauss-Bonnet Term 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 Dilatonic Black Holes with Gauss-Bonnet Term, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dilatonic Black Holes with Gauss-Bonnet Term will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-19195