X-ray Absorption in the Most-Distant RLQs: Widespread or Exceptional?

Details X-ray Absorption in the Most-Distant RLQs: Widespread or Exceptional? X-ray Absorption in the Most-Distant RLQs: Widespread or Exceptional?

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop...11b&link_type=abstract

XMM-Newton Proposal ID #06503402

Physics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Sdss 0839+5112

Scientific paper

We propose XMM-Newton spectroscopy of five typical radio-loud quasars (RLQs) at z = 3.98-4.97. Our main goal is to search for X-ray absorption to determine if it is common among RLQs at the highest redshifts, or if instead it is largely confined to the exceptional minority of extremely radio-loud objects. The results will clarify whether such absorption is a widespread environmental phenomenon or instead linked with a powerful jet directed almost precisely along the line of sight. Our proposed targets are much more representative of the overall RLQ population than the small number of highly radio-loud blazars studied at z ~ 4. We will also measure X-ray continuum shapes and search for variability and clustered AGNs.

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