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Title: Charged black holes in string-inspired gravity II. Mass inflation and dependence on parameters and potentials

Abstract

We investigate the relation between the existence of mass inflation and model parameters of string-inspired gravity models. In order to cover various models, we investigate a Brans-Dicke theory that is coupled to a U(1) gauge field. By tuning a model parameter that decides the coupling between the Brans-Dicke field and the electromagnetic field, we can make both of models such that the Brans-Dicke field is biased toward strong or weak coupling directions after gravitational collapses. We observe that as long as the Brans-Dicke field is biased toward any (strong or weak) directions, there is no Cauchy horizon and no mass inflation. Therefore, we conclude that to induce a Cauchy horizon and mass inflation inside a charged black hole, either there is no bias of the Brans-Dicke field as well as no Brans-Dicke hair outside the horizon or such a biased Brans-Dicke field should be well trapped and controlled by a potential.

Authors:
 [1];  [2]
  1. KISTI, Daejeon 305-806 (Korea, Republic of)
  2. Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan (China)
Publication Date:
OSTI Identifier:
22525453
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2015; Journal Issue: 09; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BLACK HOLES; BRANES; COSMOLOGICAL INFLATION; COUPLING; ELECTROMAGNETIC FIELDS; GRAVITATIONAL COLLAPSE; INFLATIONARY UNIVERSE; MASS; POTENTIALS; TRAPPING; U-1 GROUPS

Citation Formats

Hansen, Jakob, and Yeom, Dong-han. Charged black holes in string-inspired gravity II. Mass inflation and dependence on parameters and potentials. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/09/019.
Hansen, Jakob, & Yeom, Dong-han. Charged black holes in string-inspired gravity II. Mass inflation and dependence on parameters and potentials. United States. https://doi.org/10.1088/1475-7516/2015/09/019
Hansen, Jakob, and Yeom, Dong-han. 2015. "Charged black holes in string-inspired gravity II. Mass inflation and dependence on parameters and potentials". United States. https://doi.org/10.1088/1475-7516/2015/09/019.
@article{osti_22525453,
title = {Charged black holes in string-inspired gravity II. Mass inflation and dependence on parameters and potentials},
author = {Hansen, Jakob and Yeom, Dong-han},
abstractNote = {We investigate the relation between the existence of mass inflation and model parameters of string-inspired gravity models. In order to cover various models, we investigate a Brans-Dicke theory that is coupled to a U(1) gauge field. By tuning a model parameter that decides the coupling between the Brans-Dicke field and the electromagnetic field, we can make both of models such that the Brans-Dicke field is biased toward strong or weak coupling directions after gravitational collapses. We observe that as long as the Brans-Dicke field is biased toward any (strong or weak) directions, there is no Cauchy horizon and no mass inflation. Therefore, we conclude that to induce a Cauchy horizon and mass inflation inside a charged black hole, either there is no bias of the Brans-Dicke field as well as no Brans-Dicke hair outside the horizon or such a biased Brans-Dicke field should be well trapped and controlled by a potential.},
doi = {10.1088/1475-7516/2015/09/019},
url = {https://www.osti.gov/biblio/22525453}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 09,
volume = 2015,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 2015},
month = {Tue Sep 01 00:00:00 EDT 2015}
}