Uniqueness Theorem for 5-Dimensional Black Holes with Two Axial Killing Fields
- S. Hollands, S. Yazadjiev
- Mathematics
- 18 July 2007
We show that two stationary, asymptotically flat vacuum black holes in 5 dimensions with two commuting axial symmetries are identical if and only if their masses, angular momenta, and their “interval…
New Gauss-Bonnet Black Holes with Curvature-Induced Scalarization in Extended Scalar-Tensor Theories.
- D. Doneva, S. Yazadjiev
- PhysicsPhysical Review Letters
- 3 November 2017
It is shown that in the mentioned class of ESTGB theories there exist new black-hole solutions that are formed by spontaneous scalarization of the Schwarzschild black holes in the extreme curvature regime.
A Uniqueness Theorem for Stationary Kaluza-Klein Black Holes
- S. Hollands, S. Yazadjiev
- Mathematics
- 16 December 2008
We prove a uniqueness theorem for stationary D-dimensional Kaluza-Klein black holes with D − 2 Killing fields, generating the symmetry group $${{\mathbb R}\times U(1)^{D-3}}$$. It is shown that the…
Uniqueness of the static Einstein–Maxwell spacetimes with a photon sphere
- S. Yazadjiev, Boian V. Lazov
- Physics, Mathematics
- 23 March 2015
We consider the problem of uniqueness of static and asymptotically flat Einstein–Maxwell spacetimes with a photon sphere P3. We are using a naturally modified definition of a photon sphere for…
Magnetized black holes and black rings in the higher dimensional dilaton gravity
- S. Yazadjiev
- Physics
- 21 November 2005
In this paper we consider magnetized black holes and black rings in the higher dimensional dilaton gravity. Our study is based on exact solutions generated by applying a Harrison transformation to…
Non-perturbative and self-consistent models of neutron stars in R-squared gravity
- S. Yazadjiev, D. Doneva, K. Kokkotas, K. Staykov
- Physics
- 18 February 2014
In the present paper we investigate non-perturbatively and self-consistently the structure of neutron stars in R-squared gravity by simultaneously solving the interior and exterior problem. The…
Neutron star solutions with curvature induced scalarization in the extended Gauss-Bonnet scalar-tensor theories
- D. Doneva, S. Yazadjiev
- Physics
- 11 December 2017
In the present paper we study models of neutron stars in a class of extended scalar-tensor Gauss-Bonnet (ESTGB) theories for which the scalar degree of freedom is exited only in the strong curvature…
Radial perturbations of the scalarized Einstein-Gauss-Bonnet black holes
- J. L. Blázquez-Salcedo, D. Doneva, J. Kunz, S. Yazadjiev
- PhysicsPhysical Review D
- 15 May 2018
Recently a new class of scalarized black holes in Einstein-Gauss-Bonnet (EGB) theories was discovered. What is special for these black hole solutions is that the scalarization is not due to the…
Slowly rotating neutron stars in scalar-tensor theories with a massive scalar field
- S. Yazadjiev, D. Doneva, Dimitar Popchev
- Physics
- 15 February 2016
In the scalar-tensor theories with a massive scalar field the coupling constants, and the coupling functions in general, which are observationally allowed, can differ significantly from those in the…
BREAKDOWN OF I–LOVE–Q UNIVERSALITY IN RAPIDLY ROTATING RELATIVISTIC STARS
- D. Doneva, S. Yazadjiev, N. Stergioulas, K. Kokkotas
- Physics
- 28 October 2013
It was shown recently that normalized relations between the moment of inertia (I), the quadrupole moment (Q), and the tidal deformability (Love number) exist and for slowly rotating neutron stars…
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