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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Strong gravity effects of charged Q-clouds and inflating black holes

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Author(s):
Brihaye, Yves [1] ; Hartmann, Betti [2, 3, 4]
Total Authors: 2
Affiliation:
[1] Univ Mons Hainaut, Phys Math, B-7000 Mons - Belgium
[2] Univ Sao Paulo, Inst Fis Sao Carlos IFSC, CP 369, BR-13560970 Sao Carlos, SP - Brazil
[3] Jacobs Univ Bremen, Dept Phys & Earth Sci, D-28759 Bremen - Germany
[4] Carl von Ossietzky Univ Oldenburg, Fak Phys, D-26111 Oldenburg - Germany
Total Affiliations: 4
Document type: Journal article
Source: Classical and Quantum Gravity; v. 38, n. 6 MAR 18 2021.
Web of Science Citations: 0
Abstract

In this paper, we re-examine charged Q-clouds around spherically symmetric, static black holes. In particular, we demonstrate that for fixed coupling constants two different branches of charged scalar clouds exist around Schwarzschild black holes. This had not been noticed previously. We find that the new solutions possess a x201b;hard wall' at maximal possible gauge coupling. This wall separates the interior (containing the black hole horizon), in which the scalar field is trapped in the x201b;false vacuum', from the x201b;true vacuum' exterior. When taking back-reaction onto the space-time into account, we find that at maximal possible back-reaction, the black hole solutions corresponding to these two branches either become extremal black holes with diverging scalar field derivative on the horizon or inflating black holes with a second, x201b;cosmological' horizon which-outside this second horizon-correspond to extremal Reissner-Nordstrom black holes. (AU)

FAPESP's process: 19/01511-5 - Black holes and solitons in generalized scalar-tensor gravity models
Grantee:Betti Hartmann
Support Opportunities: Regular Research Grants