575 citations · 7k across the 182 of their papers we have counts for
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Possible dark energy imprints in gravitational wave spectrum of mixed neutron-dark-energy stars
Stoytcho S. Yazadjiev, Daniela D. Doneva
In the present paper we study the oscillation spectrum of neutron stars containing both ordinary matter and dark energy in different proportions. Within the model we consider, the…
Magnetized Black Hole on Taub-Nut Instanton
Petya G. Nedkova, Stoytcho S. Yazadjiev
We present an exact solution to the 5D Einstein-Maxwell-dilaton equations describing a static black hole on Taub-Nut instanton. By construction the solution does not possess a char…
Relativistic models of magnetars: Nonperturbative analytical approach
Stoytcho Yazadjiev
In the present paper we focus on building simple nonperturbative analytical relativistic models of magnetars. With this purpose in mind we first develop a method for generating exa…
On the Thermodynamics of 5D Black Holes on ALF Gravitational Instantons
Petya Nedkova, Stoytcho S. Yazadjiev
We investigate the thermodynamical properties of solutions to the 5D Einstein and Einstein-Maxwell-dilaton equations describing static black holes on ALF gravitational instantons.…
Time Evolution of the Radial Perturbations and Linear Stability of Solitons and Black Holes in a Generalized Skyrme Model
Daniela D. Doneva, Kostas D. Kokkotas, Ivan Zh. Stefanov +1
We study the time evolution of the radial perturbation for self-gravitating soliton and black-hole solutions in a generalized Skyrme model in which a dilaton is present. The backgr…
Uniqueness and nonuniqueness of the stationary black holes in 5D Einstein-Maxwell and Einstein-Maxwell-dilaton gravity
Stoytcho S. Yazadjiev
In the present paper we investigate the general problem of uniqueness of the stationary black solutions in 5D Einstein-Maxwell-dilaton gravity with arbitrary dilaton coupling param…