Informazioni sull’evento


Astrophysics Talk

Tuesday 19/02/2019 @ 14:00, Sala IV piano Battiferro

Romana Grossova (Università di Torino), "Radio and X-ray study of giant elliptical galaxy IC4296"

IC4296 is one of the giant elliptical galaxies, with radio counterpart PKS1333-33, which are the closest and brightest in the X-ray and optical band. Our study of the JVLA data and the XMM-Newton and Chandra data showed that it is an unusual source. JVLA D configuration data of this source revealed properties comparable with the supersonic source of the Class I Fanaroff-Riley classification and its radio structure includes huge radio lobes with diameter ~ 160 kpc. These lobes are associated with the northwestern X-ray cavity shown by the XMM-Newton data. Total enthalpy of the radio lobes, measured from the X-ray analysis, is ~10^60 erg/s, which is 25 times larger than in the case of NGC4261, due to the 6 times larger radio lobes. The powerful jets piercing through the hot X-ray atmosphere do not appear to be depositing sufficient heat in the innermost gas to prevent it from cooling. The atmosphere of the galaxy continues to cool, feeding the central supermassive black hole and powering the jet.