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Black holes in the long-range limit of torsion bigravity
- Source :
- Physical Review D, Physical Review D, American Physical Society, 2020, 102 (12), pp.124007. ⟨10.1103/PhysRevD.102.124007⟩
- Publication Year :
- 2020
- Publisher :
- American Physical Society (APS), 2020.
-
Abstract
- International audience; We continue the study of spherically symmetric black hole solutions in torsion bigravity, a class of Einstein-Cartan-type gravity theories involving, besides a metric, a massive propagating torsion field. In the infinite-range limit, these theories admit asymptotically flat black hole solutions related to the presence of attractive fixed points in the asymptotic radial evolution of the metric and the torsion. We discuss these fixed points and the way they are approached at large radii. Several phenomenological aspects of asymptotically flat torsion-hairy black holes are discussed: (i) location of the light ring and of the shadow; (ii) correction to the redshift of orbiting stars; and (iii) modification of the periastron precession of orbiting stars. By comparing the observable properties of torsion-hairy black holes to existing observational data on supermassive black holes obtained by the Event Horizon Telescope Collaboration and by the GRAVITY Collaboration, we derive constraints on the theory parameters of torsion bigravity. The strongest constraint is found to come from the recent measurement of the periastron precession of the star S2 orbiting the Galactic-center massive black hole [R. Abuter et al., Astron. Astrophys. 636, L5 (2020)AAEJAF0004-636110.1051/0004-6361/202037813 and to be a thousand times more stringent than Solar-System gravitational tests.
- Subjects :
- High Energy Physics - Theory
constraint
gravitation: model
Astrophysics::High Energy Astrophysical Phenomena
alternative theories of gravity
FOS: Physical sciences
General Relativity and Quantum Cosmology (gr-qc)
Astrophysics
01 natural sciences
Torsion field
General Relativity and Quantum Cosmology
Gravitation
star
precession
propagation
0103 physical sciences
bimetric
symmetry: rotation
parameter space
010306 general physics
orbit
Einstein-Cartan
black hole: hair
Physics
Event Horizon Telescope
Supermassive black hole
[PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th]
010308 nuclear & particles physics
torsion
redshift
Redshift
Black hole
long-range
Stars
fixed point
General relativity
High Energy Physics - Theory (hep-th)
[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc]
Precession
shadowing
Astrophysics::Earth and Planetary Astrophysics
Subjects
Details
- ISSN :
- 24700029, 24700010, 00046361, 15507998, and 15502368
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Physical Review D
- Accession number :
- edsair.doi.dedup.....286a91b7bbe4a1ee75d7e8bef20e59ea