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arXiv:astro-ph/9410029 (astro-ph)
[Submitted on 10 Oct 1994]

Title:Pictor A: A New Double-Peaked Emission Line Quasar

Authors:J. W. Sulentic, P. Marziani, T. Zwitter, M. Calvani
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Abstract: We obtained a new spectrum for the radio galaxy Pictor~A in December 1993. Comparison with previous data obtained in 1983 and 1987 shows that the broad component of the Balmer lines has increased considerably in strength and complexity. The Balmer lines now show a boxy, double peaked profile with FWZI$\sim$24000 \kms. Although the 1993 H\a\ profile is reminiscent of Arp~102B, accretion disk models face immediate difficulty because (1) the redshifted peak in the profile is considerably stronger than the blue one, and (2) the red and blue peaks varied at different epochs. The latter finding strongly favors a predominance of radial motion. We argue that Pictor~A, and the rare objects with similar extremely broad emission line profiles, are better understood if the orientation is such that the gas is predominantly moving along the line of sight (i.e.\ a geometrical extremum).
Comments: uu-encoded compressed tar of postscript files. Padova Preprint
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/9410029
  (or arXiv:astro-ph/9410029v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/9410029
Related DOI: https://doi.org/10.1086/187700

Submission history

From: Paolo Marziani [view email]
[v1] Mon, 10 Oct 1994 17:01:23 UTC (73 KB)
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