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Black holes in torsion bigravity
- Source :
- Physical Review D, Physical Review D, American Physical Society, 2020, 102 (8), pp.084027. ⟨10.1103/PhysRevD.102.084027⟩
- Publication Year :
- 2020
- Publisher :
- HAL CCSD, 2020.
-
Abstract
- We study spherically symmetric black hole solutions in a four-parameter Einstein-Cartan-type class of theories, called "torsion bigravity". These theories offer a geometric framework (with a metric and an independent torsionfull connection) for a modification of Einstein's theory that has the same spectrum as bimetric gravity models. In addition to an Einsteinlike massless spin-2 excitation, there is a massive spin-2 one (of range $\kappa^{-1}$) coming from the torsion sector, rather than from a second metric. We prove the existence of three broad classes of spherically-symmetric black hole solutions in torsion bigravity. First, the Schwarzschild solution defines an asymptotically-flat torsionless black hole for all values of the parameters. [And we prove that one cannot deform a Schwarzschild solution, at the linearized level, by adding an infinitesimal torsion hair.] Second, when considering finite values of the range, we find that there exist non-asymptotically-flat torsion-hairy black holes in a large domain of parameter space. Third, we find that, in the limit of infinite range, there exists a two-parameter family of asymptotically flat torsion-hairy black holes. The latter black hole solutions give an interesting example of non-Einsteinian (but still purely geometric) black hole structures which might be astrophysically relevant when considering a range of cosmological size.<br />Comment: 19 pages, 3 figures
- Subjects :
- Physics
010308 nuclear & particles physics
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
alternative theories of gravity
General Relativity and Quantum Cosmology (gr-qc)
Parameter space
16. Peace & justice
01 natural sciences
General Relativity and Quantum Cosmology
Black hole
Massless particle
symbols.namesake
Theoretical physics
Bimetric gravity
General relativity
0103 physical sciences
Torsion (algebra)
Schwarzschild metric
symbols
[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc]
Einstein
Connection (algebraic framework)
010306 general physics
Subjects
Details
- Language :
- English
- ISSN :
- 15507998 and 15502368
- Database :
- OpenAIRE
- Journal :
- Physical Review D, Physical Review D, American Physical Society, 2020, 102 (8), pp.084027. ⟨10.1103/PhysRevD.102.084027⟩
- Accession number :
- edsair.doi.dedup.....008e68db3b3554a31d92da9827ec3575