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EXTENDED X-RAY EMISSION IN RADIO GALAXIES: THE PECULIAR CASE OF 3C 305

2009; IOP Publishing; Volume: 692; Issue: 2 Linguagem: Inglês

10.1088/0004-637x/692/2/l123

1538-4357

F. Massaro, M. Chiaberge, P. Grandi, G. Giovannini, C. P. O’Dea, F. Macchetto, Stefi A. Baum, R. Gilli, A. Capetti, A. Bonafede, Elisabetta Liuzzo,

Astrophysical Phenomena and Observations

Extended X-ray structures are common in active galactic nuclei. Here, we present the first case of a compact steep spectrum radio galaxy, 3C 305, in which the X-ray radiation appears to be associated with the optical emission line region, dominated by the [O iii]5007. On the basis of a morphological study performed using a comparison between the X-rays, the optical, and the radio bands, we argue that the high-energy emission has a thermal nature and it is not directly linked to the radio jet and hotspots of this source. Finally, we discuss the origin of the extended X-ray structure connected with the optical emission line region following two different interpretations: as due to the interaction between matter outflows and shock-heated environment gas, or as due to gas photoionized by nuclear emission.