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T: Fachverband Teilchenphysik

T 92: Gammaastronomie 4

T 92.2: Talk

Thursday, March 1, 2012, 17:00–17:15, ZHG 008

IC 310 - A head-tail radio galaxy? — •Dorit Eisenacher — Institut für Theoretische Physik und Astrophysik, Lehrstuhl für Astronomie, 97074 Würburg, Deutschland

IC 310 is a peculiar VHE gamma-ray source detected by Fermi-LAT in high energy and by MAGIC in the very high energy range with atypically hard spectrum. It was formerly considered to be an archetypical head-tail radio galaxy. Recently, radio interferometric observations with VLBA have shown that IC 310 is a radio galaxy with a blazar-type central engine. The 'tail' at kiloparsec scales shares the direction and possibly the motion of the inner parsec-scale radio jet (the 'head'), corresponding to a blazar-type jet. The source is a key object because it is either one out of four known radio galaxies detected at TeV-energies or the closest known blazar and the presently best candidate for a hadronic accelerator among all extragalactic jets. The talk reports about the new results from MAGIC as well as from the VLBA observation and the interpretation of these.