A Search for a Hidden Broad Line Region in Cygnus A

Details A Search for a Hidden Broad Line Region in Cygnus A A Search for a Hidden Broad Line Region in Cygnus A

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.7002m&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #70.02; Bulletin of the American Astronomical Society, Vol. 25, p.919

Astronomy and Astrophysics

Astronomy

4

Scientific paper

It has been suggested that the powerful radio galaxy Cygnus A is actually a quasar whose active nucleus is obscured from our viewing direction (Barthel, ApJ, 336, 606, 1989). Imaging polarimetry by Tadhunter et al. (MNRAS, 246, 163, 1990) gives evidence that optical light in the two lobes is reflected light from a hidden central source. We have carried out spectrophotometry and spectropolarimetry of the south-east lobe with the Lick Observatory 3-m telescope. We find evidence that indeed reflected light is present, but we find no evidence of broad emission lines in the polarized flux which would establish the existence of an embedded quasar.

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