A Search for Synchrotron X-ray Emission From Radio Quasars

Details A Search for Synchrotron X-ray Emission From Radio Quasars A Search for Synchrotron X-ray Emission From Radio Quasars

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop..108l&link_type=abstract

XMM-Newton Proposal ID #05027904

Physics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Rgbj1413+4339, Wgaj0227-0847, Wgaj2320+0032, Rgbj1608+6018, Xmm-Newton Proposal 05027904

Scientific paper

We propose to observe four radio quasars with unusually high X-ray/radio core flux ratios. Such high values point to a synchrotron origin of their X-rays and this we wish to confirm. So far only low-power blazars, the BL Lacs, were known to have jets with synchrotron emission reaching energies as high as X-rays. Recently, synchrotron X-rays have been convincingly detected in one radio quasar, with suggestive evidence in four more. Establishing the existence of a large population of such sources is vital for our understanding of jet physics. In particular it will challenge the ``blazar sequence , a scenario which advocates that the frequency of the synchrotron emission peak in radio quasars is lower than that in BL Lacs since the particles in their jets suffer more severe Compton cooling.

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