247 citations · 1.5k across the 27 of their papers we have counts for
29 papers
Regular black holes do not violate the first law of thermodynamics
Bobir Toshmatov, Bobomurat Ahmedov, Nozima Isamadinova +1
Regular black holes in general relativity coupled to nonlinear electrodynamics have been reported to exhibit an apparent mismatch in their thermodynamics: the temperature obtained…
Electrically charged regular black holes in higher dimensions: Maxwellian limit, branch point of the Lagrangian, and thermodynamics
Bobir Toshmatov, Bobomurat Ahmedov, Nozima Isamadinova +2
Electrically charged regular black holes in general relativity coupled to nonlinear electrodynamics are known to require a double-valued Lagrangian density , with a branch po…
Effect of nonlinear electrodynamics on polarization distribution around black hole
Abylaikhan Tlemissov, Bobir Toshmatov, Jiří Kovář
We have investigated the polarized images of synchrotron emission from magnetically charged, spherically symmetric regular Bronnikov black hole (in general relativity coupled to no…
Tidal forces in parametrized spacetime: Rezzolla-Zhidenko parametrization
Bobir Toshmatov, Bobomurat Ahmedov
We investigate the tidal forces exerted by a spherically symmetric static parametrized black hole. Our analysis reveals that the radial and angular components of the tidal forces e…
Can electromagnetic charge inhabit in Rastall gravity?
Bobir Toshmatov, Zdeněk Stuchlík, Bobomurat Ahmedov
One of the eminent generalizations of theory of general relativity is the Rastall gravity which was {constructed} based on the assumption of the non-conserved energy-momentum tenso…
The connection between regular black holes in nonlinear electrodynamics and semi-classical dust collapse
Daniele Malafarina, Bobir Toshmatov
There exist a correspondence between black holes in non linear electrodynamics (NLED) and gravitational collapse of homogeneous dust with semi-classical corrections in the strong c…
Can a light ray distinguish charge of a black hole in nonlinear electrodynamics?
Bobir Toshmatov, Bobomurat Ahmedov, Daniele Malafarina
It is a well-known fact that light rays do not follow the null geodesics of the space-time in nonlinear electrodynamics; instead, they follow the null geodesics of the so-called ef…
Dust collapse in 4D Einstein-Gauss-Bonnet gravity
Daniele Malafarina, Bobir Toshmatov, Naresh Dadhich
We consider gravitational collapse in the recently proposed 4D limit of Einstein-Gauss-Bonnet gravity. We show that for collapse of a sphere made of homogeneous dust the process is…
Motion of spinning particles in non asymptotically flat spacetimes
Bobir Toshmatov, Ozodbek Rahimov, Bobomurat Ahmedov +1
The assumption of asymptotic flatness for isolated astrophysical bodies may be considered an approximation when one considers a cosmological context where a cosmological constant o…
Spinning test particles in the spacetime
Bobir Toshmatov, Daniele Malafarina
We consider the motion of spinning particles in the field of a well known vacuum static axially-symmetric spacetime, known as metric, that can be interpreted as a generalizatio…
Quasinormal modes of magnetized black hole
Bobur Turimov, Bobir Toshmatov, Bobomurat Ahmedov +1
We investigate charged, massive scalar field around static, spherically symmetric black hole immersed into an external asymptotically uniform magnetic field . It is shown that f…
Harmonic oscillations of neutral particles in the -metric
Bobir Toshmatov, Daniele Malafarina, Naresh Dadhich
We consider a well-known static, axially symmetric, vacuum solution of Einstein equations belonging to Weyl's class and determine the fundamental frequencies of small harmonic osci…
Relaxations of perturbations of spacetimes in general relativity coupled to nonlinear electrodynamics
Bobir Toshmatov, Zdeněk Stuchlík, Bobomurat Ahmedov +1
Three well known exact regular solutions of general relativity (GR) coupled to nonlinear electrodynamics (NED), namely the Maxwellian, Bardeen and Hayward regular spacetimes, which…
Electromagnetic perturbations of black holes in general relativity coupled to nonlinear electrodynamics: Polar perturbations
Bobir Toshmatov, Zdeněk Stuchlík, Bobomurat Ahmedov
The \textit{axial} electromagnetic (EM) perturbations of the black hole (BH) solutions in general relativity coupled to nonlinear electrodynamics (NED) were studied for both electr…
Comment on "Construction of regular black holes in general relativity"
Bobir Toshmatov, Zdeněk Stuchlík, Bobomurat Ahmedov
We claim that the physical parameters of the constructed black hole solutions in general relativity (GR) coupled to nonlinear electrodynamics (NED) by Zhong-Ying Fan and Xiaobao Wa…
Electromagnetic perturbations of black holes in general relativity coupled to nonlinear electrodynamics
Bobir Toshmatov, Zdeněk Stuchlík, Jan Schee +1
The electromagnetic (EM) perturbations of the black hole solutions in general relativity coupled to nonlinear electrodynamics (NED) are studied for both electrically and magnetical…
Note on the character of the generic rotating charged regular black holes in general relativity coupled to nonlinear electrodynamics
Bobir Toshmatov, Zdeněk Stuchlík, Bobomurat Ahmedov
We demonstrate that the generic charged rotating regular black hole solutions of general relativity coupled to non-linear electrodynamics, obtained by using the alternate Newman-Ja…
Slowly decaying resonances of massive scalar fields around Schwarzschild-de Sitter black holes
Bobir Toshmatov, Zdeněk Stuchlík
We study in special limiting cases quasinormal modes of massive scalar fields in the Schwarzschild-de Sitter black hole backgrounds. We determine the lower limit on the mass parame…
Comments on "Casimir Effect in the Kerr spacetime with Quintessence"
Bobir Toshmatov, Zdeněk Stuchlík, Bobomurat Ahmedov
This comment is devoted to the recalculation of the Casimir energy of a massless scalar field in the Kerr black hole surrounded by quintessence derived in [B. Toshmatov, Z. Stuchlí…
Scalar perturbations of nonsingular nonrotating black holes in conformal gravity
Bobir Toshmatov, Cosimo Bambi, Bobomurat Ahmedov +2
We study scalar and electromagnetic perturbations of a family of nonsingular nonrotating black hole spacetimes that are solutions in a large class of conformally invariant theories…
Generic rotating regular black holes in general relativity coupled to nonlinear electrodynamics
Bobir Toshmatov, Zdeněk Stuchlík, Bobomurat Ahmedov
We construct regular rotating black hole and no-horizon spacetimes based on the recently introduced spherically symmetric generic regular black hole spacetimes related to electric…
Gravitational instability of polytropic spheres containing region of trapped null geodesics: a possible explanation of central supermassive black holes in galactic halos
Zdeněk Stuchlík, Jan Schee, Bobir Toshmatov +2
We study behaviour of gravitational waves in the recently introduced general relativistic polytropic spheres containing a region of trapped null geodesics extended around radius of…
Energy conditions of non-singular black hole spacetimes in conformal gravity
Bobir Toshmatov, Cosimo Bambi, Bobomurat Ahmedov +2
Conformal gravity can elegantly solve the problem of spacetime singularities present in Einstein's gravity. For every physical spacetime, there is an infinite family of conformally…
Quasinormal frequencies of black hole in the braneworld
Bobir Toshmatov, Zdeněk Stuchlík, Jan Schee +1
We have studied scalar, electromagnetic and gravitational perturbations of the four-dimensional Reissner-Nordström-like black holes with a \textit{tidal charge} in the Randall-Sund…