Black holes in Einstein-Gauß-Bonnet-dilaton theory

Generalizations of the Schwarzschild and Kerr black holes are discussed in an astrophysically viable generalized theory of gravity, which includes higher curvature corrections in the form of the Gauss-Bonnet term, coupled to a dilaton. The angular momentum of these black holes can slightly exceed th...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2016-09, Vol.12 (S324), p.265-272
Main Authors: Blázquez-Salcedo, Jose Luis, Cardoso, Vitor, Ferrari, Valeria, Gualtieri, Leonardo, Kanti, Panagiota, Khoo, Fech Scen, Kleihaus, Burkhard, Kunz, Jutta, Macedo, Caio F. B., Mojica, Sindy, Pani, Paolo, Radu, Eugen
Format: Article
Language:English
Subjects:
Angular momentum
Astronomy
Binary stars
Black holes
Circular orbits
Contributed Papers
Curvature
Gravitational waves
Orbits
Particulates
X ray binaries
X ray stars
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Summary:Generalizations of the Schwarzschild and Kerr black holes are discussed in an astrophysically viable generalized theory of gravity, which includes higher curvature corrections in the form of the Gauss-Bonnet term, coupled to a dilaton. The angular momentum of these black holes can slightly exceed the Kerr bound. The location and the orbital frequency of particles in their innermost stable circular orbits can deviate significantly from the respective Kerr values. Study of the quasinormal modes of the static black holes gives strong evidence that they are mode stable against polar and axial perturbations. Future gravitational wave observations should improve the current bound on the Gauss-Bonnet coupling constant, based on observations of the low-mass x-ray binary A 0620-00.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921316012965