62 citations · 62 across the 14 of their papers we have counts for
15 papers
Taub-NUT as gravitational dyon with torsion
Dmitri Gal'tsov, Rostom Karsanov
We show that the Levi-Civita connection for the Taub-NUT metric is singular on Misner strings and generates an Einstein tensor containing the squares of the delta function. This ca…
Gravielectric and gravimagnetic fluxes in nutty black holes
Dmitri Gal'tsov, Rostom Karsanov
We introduce the gravielectric (GE) and gravimagnetic (GM) fields in stationary spacetime using the Komar two-form and its dual. This opens the way to extend the Komar-Tomimatsu de…
Precision tests of analytical tail-term approximations for radiation reaction in Schwarzschild spacetime
Bakhtinur Juraev, Arman Tursunov, Zdeněk Stuchlík +2
We investigate the consistency and precision of approximate analytical expressions for the electromagnetic self-force acting on a charged particle in Schwarzschild spacetime endowe…
Charged nutty black holes are hairy
Dmitri Gal'tsov, Rostom Karsanov
We uncover the physical nature of the electric and magnetic monopoles discovered by McGuire and Ruffini on Misner strings accompanying charged nutty black holes, showing that these…
Electromagnetic radiation-reaction near black holes: orbital widening and the role of the tail
Bakhtinur Juraev, Arman Tursunov, Zdeněk Stuchlík +2
We investigate the orbital evolution of a classical charged particle around a Schwarzschild black hole immersed in an external, uniform magnetic field, taking into full account bot…
Perturbation theory for gravitational shadows in Kerr-like spacetimes
Kirill Kobialko, Dmitri Gal'tsov
We present a fully analytical method for calculating the key parameters of a Kerr-like gravitational shadow, including its horizontal and vertical diameters, and , the c…
Gravitational shadow and emission spectrum of thin accretion disks in a plasma medium
Kirill Kobialko, Dmitri Gal'tsov, Alexey Molchanov
In anticipation of future multi-frequency observations of black hole with the Next Generation Event Horizon Telescope (ngEHT), we construct spectral images of a thin accretion disk…
Gauged supergravities: solutions with Killing tensor
Dmitri Gal'tsov, Rostom Karsanov
We perform full integration of the stationary axisymmetric Einstein-Maxwell-dilaton-axion (EMDA) theory with and without potential using a recently proposed generalization of Carte…
Perturbation theory for gravitational shadows in static spherically symmetric spacetimes
Kirill Kobialko, Dmitri Gal'tsov
We develop a perturbation theory for surfaces confining photons and massive particles in static spherically symmetric spacetimes in terms of two parameters: the mass-to-energy rati…
Petrov types, separability and generalized photon surfaces of supergravity black holes
Dmitri Gal'tsov, Aleksandr Kulitskii
The vacuum and electrovacuum Einstein equations for spacetimes with two commuting Killing vectors can be solved by indirect methods of integrable systems. But if, in addition, the…
Uniqueness of the static vacuum asymptotically flat spacetimes with massive particle spheres
Kirill Kobialko, Igor Bogush, Dmitri Gal'tsov
In this paper, we establish that a four-dimensional static vacuum asymptotically flat spacetime containing a massive particle sphere is isometric to the Schwarzschild spacetime. Ou…
Mass formulas for supergravity black holes with string singularities
Igor Bogush, Dmitri Gal'tsov, Gérard Clément
We extend the derivation of mass formulas for stationary axisymmetric asymptotically locally flat solutions with string singularities on the polar axis to general supergravity acti…
Constructing massive particles surfaces in static spacetimes
Igor Bogush, Kirill Kobialko, Dmitri Gal'tsov
The procedure for constructing the massive particle surfaces in static space-times is described in detail and the equivalence of the main results with the results of the geodesic a…
Black hole shadows of massive particles and photons in plasma
Kirill Kobialko, Igor Bogush, Dmitri Gal'tsov
Explicitly covariant analytical expressions are derived that describe the boundaries of shadows cast by massive particles scattered by a gravitating object. This covers scenarios w…
Stationary BPS solutions to dilaton-axion gravity
Gérard Clément, Dmitri Gal'tsov
Stationary four-dimensional BPS solutions to gravity coupled bosonic theories admitting a three-dimensional sigma-model representation on coset spaces are interpreted as null geode…