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Polarization from an orbiting spot

Published online by Cambridge University Press:  01 August 2006

Michal Dovčiak ,
Vladimír Karas  and
Giorgio Matt
Michal Dovčiak
Affiliation:
Astronomical Institute, Academy of Sciences, Prague, Czech Republic email: dovciak@astro.cas.cz, vladimir.karas@cuni.cz
Vladimír Karas
Affiliation:
Astronomical Institute, Academy of Sciences, Prague, Czech Republic email: dovciak@astro.cas.cz, vladimir.karas@cuni.cz
Giorgio Matt
Affiliation:
Dipartimento di Fisica, Università degli Studi Roma Tre, Rome, Italy email: matt@fis.uniroma3.it
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Abstract

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The polarization from a spot orbiting around Schwarzschild and extreme Kerr black holes is studied. The time dependence of the degree and angle of polarization during the spot revolution is examined as a function of the observer's inclination angle and black hole angular momentum. The gravitational and Doppler shifts, lensing effect as well as time delays are taken into account.

Keywords

Black hole physics – accretionaccretion disks – polarization
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 359 - 360
Copyright
Copyright © International Astronomical Union 2007

References

Dovčiak, M., Karas, V., Matt, G. 2004, MNRAS, 355, 1005Google Scholar
Dovčiak, M., Karas, V., Matt, G. 2006, Astron. Nachrichten, 327, 993Google Scholar
Eckart, A., Schödel, R., Meyer, L. et al. 2006, ESO Messenger, 125, 2Google Scholar