Electromagnetic signatures of strong-field gravity: light curves, spectra and polarization from accreting black-holes
Abstract
Observations help us to test General Relativity. Whereas the No-hair Theorem states that classical, isolated black holes are fully characterized by a small number of parameters, cosmic black holes are not isolated. Instead they interact with their environment. Hence, the astrophysically realistic models require more parameters. New techniques allow us to obtain independent constraints also on these additional parameters. In this context non-electromagnetic messengers have emerged (gravitational waves and neutrinos) and novel electromagnetic observations are to come and supplement traditional techniques in the near future. We will review a fruitful approach to explore variety of electromagnetic radiation signatures from accretion disks in strong gravity regime with the upcoming satellite missions for timing, spectra, and polarimetry.
- Publication:
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43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E1567K