{"id":2589,"date":"2022-05-10T11:13:36","date_gmt":"2022-05-10T02:13:36","guid":{"rendered":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/?post_type=seminar&p=2589"},"modified":"2022-05-10T11:23:10","modified_gmt":"2022-05-10T02:23:10","slug":"multi-messenger-signals-from-unjetted-active-supermassive-black-holes","status":"publish","type":"seminar","link":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/2589\/","title":{"rendered":"Multi-Messenger Signals from Unjetted Active Supermassive Black Holes"},"content":{"rendered":"

“KMI colloquium” 25th May (Wed)\u00a0 17\uff1a00 –<\/span><\/strong><\/span>
\n<\/span><\/strong><\/span>Speaker<\/span> :<\/span><\/span>Yoshiyuki Inoue (Assoc. Prof. of Osaka-U)
\n<\/span>Title :<\/span><\/span>Multi-Messenger Signals from Unjetted Active Supermassive Black Holes
\n<\/span>Place : zoom
\n\"\"
\n<\/span><\/p>\n

\n

Abstract:
\n<\/span>Central supermassive black holes of active galactic nuclei (AGNs) host hot plasma with a temperature of 10<\/span>^9<\/sup> K, 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, I will report the first clear detection of coronal magnetic activity in nearby AGNs using ALMA (radio telescopes). The measured magnetic field is weaker than the theoretical expectation, requiring a new corona heating mechanism. I will also discuss particle acceleration processes in the coronae of Seyferts based on our ALMA measurements. Such processes would produce high energy neutrinos seen by IceCube and MeV gamma-ray photons. Future radio (ALMA, ngVLA, LST), X-ray (XRISM, FORCE, Athena), and MeV gamma-ray (COSI, GRAMS, AMEGO) observations will provide critical tests to our scenario.<\/span><\/p>\n

<\/pre>\n<\/div>\n
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Prof. of Osaka-U)","s_place":"zoom","s_place_other":"","s_categoryother":"","s_poster":"","s_poster2":"","s_slide":""},"yoast_head":"\nMulti-Messenger Signals from Unjetted Active Supermassive Black Holes - KMI - Nagoya University<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/2589\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Multi-Messenger Signals from Unjetted Active Supermassive Black Holes - KMI - Nagoya University\" \/>\n<meta property=\"og:description\" content=\"“KMI colloquium” 25th May (Wed)\u00a0 17\uff1a00 – Speaker :Yoshiyuki Inoue (Assoc. 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