8 papers · 1 filter
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…