The X-ray View of Compact Radio Sources

Details The X-ray View of Compact Radio Sources The X-ray View of Compact Radio Sources

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..427..159g&link_type=abstract

Accretion and Ejection in AGN: a Global View. Proceedings of a conference held June 22-26, 2009 in Como, Italy. Edited by Laura

Computer Science

Scientific paper

This paper presents recent results from Chandra and XMM-Newton observations of compact radio galaxies. Both the shape of the X-ray spectra and the broadband Spectral Energy Distributions suggest that the high-energy emission of their compact cores (≲1 kpc) is primarily due to accretion. Quasars (and the galaxy B1345+125) show additionally a wide variety of X-ray morphologies, such as extended emission on scales ≳1 kpc, and large scale jets, the latter being possible signatures of recurrent activity. Quasars X-ray spectra are generally unobscured, whereas high column densities (≳1022 cm-2) are common in galaxies. Even in Compton-thick sources, however, the gas density is not enough to permanently confine the jet. If the high-energy emission of X-ray bright compact radio galaxies is primarily due to accretion, their jets are expected to evolve unimpeded through the interstellar medium and reach their full maturity as FR II radio galaxies. However, data do not rule out an alternative evolutionary channel, ending in low-power, highly disrupted FR I jets.

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