Speaker
Zdeněk Stuchlík
(Silesian University in Opava)
Description
We analyze the properties of the Kerr black hole (BH) photon shell, focusing on the influence of aggregates of corotating and counterrotating toroids (ringed accretion disks - RAD) orbiting in the BH photon shell. The particular case of a corotating accretion disk orbiting in the BH ergoregion is also investigated. We study influence on the BH shadow boundary, fixing the conditions under which it is possible to observe the ergoregion and RAD "imprint" on the shadows boundary. In general, remarkable differences appear between the counterrotating photon components of the boundary with respect to the corotating ones. In particular, we investigate the bound unstable spherical photon orbits int he ergoregion, or at the inversion point,
Primary author
Daniela Pugliese
(Research Centre for Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava, Bezru£ovo nám¥stí 13, CZ-74601 Opava, Czech Republic)
Co-author
Zdeněk Stuchlík
(Silesian University in Opava)