Detection Of DLA Candidate Galaxies Towards PKS 1756+237 And Q 0551-366 At z=1.67,1.96

Details Detection Of DLA Candidate Galaxies Towards PKS 1756+237 And Q 0551-366 At z=1.67,1.96 Detection Of DLA Candidate Galaxies Towards PKS 1756+237 And Q 0551-366 At z=1.67,1.96

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5409w&link_type=abstract

American Astronomical Society, AAS Meeting #211, #54.09; Bulletin of the American Astronomical Society, Vol. 39, p.825

Physics

Optics

Scientific paper

We present the results of an adaptive optics imaging search for damped Lyman-α galaxies near the vicinity of quasars PKS 1756+237 and Q 0551-366. Prior spectral studies have detected damped Lyman-α or strong metal line absorption in the spectra of the two quasars corresponding to redshifts of z=1.67 and z=1.96, respectively. Both these systems are distinctive due to the confirmed detections of C I absorption, with molecular H also present in the spectra of the DLA towards Q 0551-366. Data was obtained in October 2001 and April 2002 using the University of Hawaii (IfA) Hokupa'a/QUIRC 36-element curvature AO system at Gemini North Observatory. The Hokupa'a AO system allowed users to guide on faint guide stars ( 17.5 mag), with a resulting resolution of 0.26” in the imaging data presented here. We have identified candidate DLA galaxies toward each of the quasars. The candidate for PKS 1756+237 is well separated from the quasar, while the Q 0551-366 candidate is only apparent after PSF subtraction.
The Gemini Observatory is operated by the AURA, Inc. , under a cooperative agreement with the NSF on behalf of the Gemini partnership.

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