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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:
Sponsoring Org.:
SCOAP3, CERN, Geneva (Switzerland)
OSTI Identifier:
22458372
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 09; Other Information: PUBLISHER-ID: JCAP09(2015)019; OAI: oai:repo.scoap3.org:11697; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BLACK HOLES; CAUCHY PROBLEM; COSMOLOGICAL INFLATION; ELECTROMAGNETIC FIELDS; GRAVITATIONAL COLLAPSE; MASS; SCALAR FIELDS; U-1 GROUPS; UNIFIED GAUGE MODELS

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. doi:10.1088/1475-7516/2015/09/019.
Hansen, Jakob, and Yeom, Dong-han. Mon . "Charged black holes in string-inspired gravity II. Mass inflation and dependence on parameters and potentials". United States. doi:10.1088/1475-7516/2015/09/019.
@article{osti_22458372,
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},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 09,
volume = 2015,
place = {United States},
year = {Mon Sep 07 00:00:00 EDT 2015},
month = {Mon Sep 07 00:00:00 EDT 2015}
}