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arXiv:astro-ph/0512116 (astro-ph)
[Submitted on 5 Dec 2005]

Title:Adaptive Optics Imaging of Low-redshift Damped Lyman-alpha Quasar Absorbers

Authors:Mark R. Chun (1), Soheila Gharanfoli (2), Varsha P. Kulkarni (2), Marianne Takamiya (3) ((1)Institute for Astronomy, University of Hawaii, Hilo (2)Dept. of Physics and Astronomy, University of South Carolina, Columbia (3)Dept. of Physics and Astronomy, University of Hawaii, Hilo)
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Abstract: We have carried out a high angular resolution near-infrared imaging study of the fields of 6 quasars with 7 strong absorption line systems at z < 0.5, using the Hokupa'a adaptive optics system and the QUIRC near-infrared camera on the Gemini-North telescope. These absorption systems include 4 classical damped Lyman-alpha absorbers (DLAs), 2 sub-DLAs, and one Lyman-limit system. Images were obtained in the H or K' filters with FWHM between 0.2"-0.5" with the goal of detecting the absorbing galaxies and identifying their morphologies. Features are seen at projected separations of 0.5"-16.0" from the quasars and all of the fields show features at less than 2" separation. We find candidate absorbers in all of the seven systems. With the assumption that some of these are associated with the absorbers, the absorbers are low luminosity < 0.1 L*_H or L*_K; we do not find any large bright candidate absorbers in any of our fields. Some fields show compact features that are too faint for quantitative morphology, but could arise in dwarf galaxies.
Comments: 37 pages, 24 figures, 5 tables, Accepted on Oct. 26 2005 for publication in Astronomical Journal. The figures have been lowered in resolution to make them fit the size requirements for astroph submission. A PDF file with original high-resolution figures can be found at this http URL
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0512116
  (or arXiv:astro-ph/0512116v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0512116
Journal reference: Astron.J.131:686-700,2006
Related DOI: https://doi.org/10.1086/499299

Submission history

From: Soheila Gharanfoli [view email]
[v1] Mon, 5 Dec 2005 20:10:53 UTC (514 KB)
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