AC1 - Spectral and Temporal properties of Black Holes and neutron stars and the theoretical models |
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Speaker |
Falcke, Heino |
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Coauthors |
Bronzwaer, Thomas; Davelaar, Jordy; Moscibrodzka, Monika |
| Talk Title |
Investigating The Source Geometry Of Accreting Black Holes From Near And Afar |
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Abstract |
Observational efforts are underway to accurately measure the key properties of supermassive black holes such as Sagittarius A*, and the Event Horizon Telescope (EHT) aims to image the black hole's accretion flow at the scale of the event horizon. To enhance theoretical understanding of the link between a black hole's key properties and its observed source geometry, we investigate the relation between a black hole's spin parameter and the appearance of its surrounding accretion disk to a distant observer. We use radiative-transfer calculations in the context of both a jet-dominated and a disk-dominated radiative model. We find that, at observer inclinations greater than 30 degrees, i.e., the majority of cases, the disk-dominated model is moderately skewed, while the jet-dominated model is approximately symmetric. Additionally, we create a number of VR animations, which simulate the appearance of the accretion flow to an observer who is traveling through the accretion disk itself. This is achieved using a full-sky camera. Besides being of scientific interest, we find that such animations are an effective tool for scientific outreach purposes. |
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Talk view |
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