Strong gravity effects of charged Q-clouds and inflating black holes
- 7 January 2021
- journal article
- research article
- Published by IOP Publishing in Classical and Quantum Gravity
- Vol. 38 (6), 06LT01
- https://doi.org/10.1088/1361-6382/abd95a
Abstract
N 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 ``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 ``false vacuum'', from the ``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, ``cosmological'' horizon which -- outside this second horizon -- correspond to extremal Reissner-Nordström black holes.Keywords
Funding Information
- Deutsche Forschungsgemeinschaft (RTG 1620)
- Fundação de Amparo à Pesquisa do Estado de São Paulo (2019/01511-5)
This publication has 25 references indexed in Scilit:
- Rotating boson stars and-balls. II. Negative parity and ergoregionsPhysical Review D, 2008
- Rotating boson stars and-ballsPhysical Review D, 2005
- Black holes cannot support conformal scalar hairJournal of Mathematical Physics, 1995
- Novel ‘‘no-scalar-hair’’ theorem for black holesPhysical Review D, 1995
- A simple proof of a no-hair theorem in Einstein-Higgs theoryClassical and Quantum Gravity, 1995
- Monopoles as big as a universePhysics Letters B, 1994
- Topological inflationPhysical Review Letters, 1994
- Boson starsPhysics Reports, 1992
- Scalar soliton stars and black holesPhysical Review D, 1987
- Extraction of Energy and Charge from a Black HolePhysical Review D, 1973