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Speaker |
Karas, Vladimir |
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Coauthors |
Dovciak Michal; Svoboda Jiri; Zhang Wenda; Matt Giorgio; Eckart Andreas; Zajacek Michal |
| Talk Title |
Polarimetry and strong gravity effects from spots orbiting near a black hole |
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Abstract |
We study the modulation of the observed radiation flux and the associated changes in the polarization degree and angle that are predicted by the orbiting spot model for flares from accreting black holes. The geometric shape of the emission region influences the resulting model light curves, namely, the emission region of a spiral shape can be distinguished from a simpler geometry of a small orbiting spot. We further explore this scheme for the observed flares from the supermassive black hole in the context of Galactic center (Sgr A*). Our code simulates the light curves for a wide range of parameters. The energy dependence of the changing degree and angle of polarization should allow us to discriminate between the cases of a rotating vs. non-rotating black hole. |
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Talk view |
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