Colloquium:- Coronal Magnetic Activity in nearby Active Supermassive Black Holes
Central supermassive black holes of active galactic nuclei(AGNs) host hot plasma with a temperature of 10^9K, namely coronae. Like the Sun, black hole coronae are theoretically believed to be heated by their magnetic activity. However, such activity has not been observed yet. In this talk, the speaker will report the first clear detection of coronal magnetic activity in nearby AGNs using ALMA(radio telescopes). The coronal magnetic fields are typically ~10G on scales of ~40 Schwarzschild radii. The measured magnetic field is weaker than the theoretical expectation, requiring a new corona heating mechanism. The speaker will also discuss particle acceleration processes in the coronae of Seyferts, which may be the production sites of the high energy neutrinos seen by IceCube.
講者：Prof. Yoshiyuki INOUE 井上芳幸教授(日本大阪大学 大学院理学研究科 宇宙地球科学専攻)