Associated Absorption in Radio-Loud Quasars

Details Associated Absorption in Radio-Loud Quasars Associated Absorption in Radio-Loud Quasars

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...186.4503a&link_type=abstract

American Astronomical Society, 186th AAS Meeting, #45.03; Bulletin of the American Astronomical Society, Vol. 27, p.876

Astronomy and Astrophysics

Astronomy

Scientific paper

We have found eight quasars with associated \MgII\ absorption (zabs ~ zqso) in a spectroscopic survey of 56 steep-radio-spectrum quasars. Several of these quasars have the unusual properties of having very red rest-frame colors and/or high optical polarization. In contrast, quasars selected by the presence of associated \CIV\ absorption show neither of these characteristics, although in both cases the absorption is correlated with steep radio spectral index. We discuss possible origins for associated absorption, including cluster galaxies, intracluster material, and material intrinsic to the quasar. The \MgII\ absorbed quasars, along with several \CIV\ absorbed quasars, have been re-observed at 80kms(-1) resolution. In addition, we have obtained spectropolarimetry of the two highest polarization objects (3C68.1 and 3C212). We present these data and discuss their implications.

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