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- Sofia University "St. Kliment Ohridski"BG36 papers
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5 papers · 1 filter
Mass-density relationship in molecular cloud clumps
Sava Donkov, Todor Veltchev, Ralf S. Klessen
We study the mass-density relationship n ~ m^x in molecular cloud condensations (clumps), considering various equipartition relations between their gravitational, kinetic, internal…
Symmetry and uniqueness of minimizers of Hartree type equations with external Coulomb potential
Vladimir Georgiev, George Venkov
In the present article we study the radial symmetry of minimizers of the energy functional, corresponding to the repulsive Hartree equation in external Coulomb potential. To overco…
Quasi-normal modes, bifurcations and non-uniqueness of charged scalar-tensor black holes
Daniela D. Doneva, Stoytcho S. Yazadjiev, Kostas D. Kokkotas +1
In the present paper we study the scalar sector of the quasinormal modes of charged general relativistic, static and spherically symmetric black holes coupled to nonlinear electrod…
Connection between black-hole quasinormal modes and lensing in the strong deflection limit
Ivan Zh. Stefanov, Stoytcho S. Yazadjiev, Galin G. Gyulchev
The purpose of the current Letter is to give some relations between gravitational lensing in the strong-deflection limit and the frequencies of the quasinormal modes of spherically…
Charged anti-de Sitter scalar-tensor black holes and their thermodynamic phase structure
Daniela D. Doneva, Stoytcho S. Yazadjiev, Kostas D. Kokkotas +2
In the present paper we numerically construct new charged anti-de Sitter black holes coupled to nonlinear Born-Infeld electrodynamics within a certain class of scalar-tensor theori…