Near-infrared polarimetry as a tool for testing properties of accreting supermassive black holes

0359497 - ASÚ 2012 RIV GB eng J - Článek v odborném periodiku
Zamaninasab, M. - Eckart, A. - Dovčiak, Michal - Karas, Vladimír - Schoedel, R. - Witzel, G. - Sabha, N. - García-Marín, M. - Kunneriath, D. - Muzic, K. - Straubmeier, C. - Valencia-S, M. - Zensus, J. A.
Near-infrared polarimetry as a tool for testing properties of accreting supermassive black holes.
Monthly Notices of the Royal Astronomical Society. Roč. 413, č. 1 (2011), s. 322-332. ISSN 0035-8711. E-ISSN 1365-2966
Grant CEP: GA ČR GA205/07/0052
Výzkumný záměr: CEZ:AV0Z10030501
Klíčová slova: polarimetry * black holes * relativity * galactic centre
Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
Impakt faktor: 4.900, rok: 2011

A new method of searching for the time-lag between orthogonal polarization channels is developed and applied to an ensemble of hotspot models that samples a wide range of parameter space. We found that the hotspot model predicts signatures in polarized light which are in the range to be measured directly in the near future. The results of the application of the method to the available near-infrared polarimetric data of Sagittarius A* (Sgr A*) are presented. It is shown that even with the currently available data, the spin and inclination of Sgr A* can be constrained.
Trvalý link: http://hdl.handle.net/11104/0197278