AGN Coronae in the NuSTAR era
Abstract
The hard X-ray power-law continuum in AGN originates in a magnetically-powered corona above the centre of the accretion disc. Recent observations, particularly from NuSTAR, show that the corona is radiatively compact and has a temperature typically in the range of 30 to 300 keV. The position of AGN within the compactness-temperature plane suggests that they are controlled by electron-pair production. We explore hybrid plasmas and high magnetic compactness as necessary in order to account for the observed behaviour.
- Publication:
-
AAS/High Energy Astrophysics Division #16
- Pub Date:
- August 2017
- Bibcode:
- 2017HEAD...1620006F