Erratum: Nonexistence of black holes with noncanonical scalar fields [Phys. Rev. D89, 084056 (2014)]

Entropies of Scalar Fields on Three Dimensional Black Holes

Thermodynamics of scalar fields is investigated in three dimensional black hole backgrounds in two approaches. One is mode expansion and direct computation of the partition sum, and the other is the Euclidean path integral approach. We obtain a number of exact results, for example, mode functions, Hartle-Hawking Green functions on the black holes, Green functions on a cone geometry, free energi...

Scalar Black Holes

A class of exact regular spherically symmetric solutions to the Einstein equation obeying Dymnikova’s definition T 1 1 = T 0 0 of vacuumlike state is considered. These solutions, that may be interpreted as black holes, are not only singularity free, but also do not set us thinking about the loss of information under gravitational collapse. However, according to the singularity theorems, the geo...

Charged black holes with scalar hair.

Hawking Radiation of Five-dimensional Charged Black Holes with Scalar Fields

We investigate the Hawking radiation cascade from the five-dimensional charged black hole with a scalar field coupled to higher-order Euler densities in a conformally invariant manner. We give the semi-analytic calculation of greybody factors for the Hawking radiation. Our analysis shows that the Hawking radiation cascade from this five-dimensional black hole is extremely sparse. The charge enh...

Magnetic Fields Around Black Holes

Title of Dissertation: Magnetic Fields Around Black Holes David A. G. Garofalo, Doctor of Philosophy, 2008 Dissertation directed by: Professor Christopher Stephen Reynolds Department of Astronomy Active Galactic Nuclei are the most powerful long-lived objects in the universe. They are thought to harbor supermassive black holes that range from 1 million solar masses to 1000 times that value and ...