Revealing the general relativity effects in accretion events near a supermassive black hole

0359757 - ASÚ 2012 RIV US eng C - Conference Paper (international conference)
Karas, Vladimír - Dovčiak, Michal - Zamaninasab, M. - Eckart, A.
Revealing the general relativity effects in accretion events near a supermassive black hole.
The Galactic Center: A Window to the Nuclear Environment of Disk Galaxies. San Francisco: Astronomical Society of the Pacific, 2011 - (Morris, M.; Wang, Q.; Yuan, F.), s. 344-345. ASP Conference Series, 439. ISBN 978-1-58381-758-2.
[The Galactic Centre: A Window to the Nuclear Environment of Disk Galaxies. Shanghai (CN), 19.10.2009-23.10.2009]
R&D Projects: GA ČR GA205/07/0052
Institutional research plan: CEZ:AV0Z10030501
Keywords : galactic centre
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

We discuss the general relativity effects acting on the radiation signal from the inner accretion flow. We consider the radiation flux and polarization properties originating from a blob of gas near a rotating black hole. The predicted observed polarization at infinity is changed from its local value due to strong gravity and fast orbital motion. Different processes can produce the observed pattern: in the context of Sgr A* flares, the synchrotron mechanism and the inverse Compton up-scattering appear to be the most likely mechanisms.
Permanent Link: http://hdl.handle.net/11104/0197475