GN1 - Gravitational physics of the galactic center |
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Speaker |
Younsi, Ziri |
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Coauthors |
Wu, Kinwah |
| Talk Title |
Variations in Emission from Episodic Plasmoid Ejecta from Black Holes |
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Abstract |
The X-ray and radio flares observed in X-ray binaries and active galactic nuclei are attributed to energetic electrons in the plasma ejecta from the accretion flows near the black hole in these systems. It is argued that magnetic reconnection occurs in the coronae above the accretion disk around the black hole and that this drives plasmoid outflows resembling the solar coronal mass ejection (CME) phenomenon. The X-ray and radio flares are emission form energetic electrons produced in the process. As the emission region is located near the black hole event horizon, the flare emission would subject to special and general relativistic effects. We present calculations of the flaring emission from plasmoids orbiting around a black hole and plasmoid ejecta launched from the inner accretion disk where general relativistic effects are crucial in determining the observed time-dependent properties of the emission. We consider a fully general relativistic radiative transfer calculation of the emission from evolving ejecta from black hole systems and determine the emission lightcurves of plasmoids when they are in orbit and when they break free from the magnetic confinement. Implications for interpreting time-dependent spectroscopic observations of flaring emission from accreting black holes are also discussed. |
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Talk view |
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