317 citations · 3.8k across the 172 of their papers we have counts for
5 papers · 2 filters
On the role of strong gravity in polarization from scattering of light in relativistic flows
J. Horak, V. Karas
We study linear polarization due to scattering of light on a cloudlet of particles, taking into account the radiation drag and the gravitational pull exerted on them by a central b…
Radio Quiet AGN
B. Czerny, R. Goosmann, V. Karas +1
Active Galactic Nuclei are powered by accretion onto massive black holes. Although radio-quiet objects are not as spectacular sources of very high energy photons as radio-loud ones…
Interaction between stars and an inactive accretion disc in a galactic core
V. Karas, L. Subr
We discuss the structure of a central stellar cluster whose dynamics is influenced by gravitation of a supermassive black hole and by the dissipative interaction of orbiting stars…
Polarization signatures of strong gravity in black-hole accretion discs
V. Karas, M. Dovciak, G. Matt
We discuss the effects of strong gravity on the polarization properties of a black hole accretion disc. The intrinsic polarization is computed taking into account light scattered o…
On highly eccentric stellar trajectories interacting with a self-gravitating disc in Sgr A*
L. Subr, V. Karas
We propose that Kozai's phenomenon is responsible for the long-term evolution of stellar orbits near a supermassive black hole. We pursue the idea that this process may be driven b…