Computer Science
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8015j&link_type=abstract
HST Proposal ID #8015
Computer Science
Hst Proposal Id #8015 Agn/Quasars
Scientific paper
This program seeks to learn more about the properties of metal-line systems and the Lyman-alpha forest at low redshifts, so that they may be compared with findings about such systems at much higher redshifts studied from ground-based observatories. The emphasis of this program will be on features with rest wavelengths equal to or shorter than Lyman-alpha. At low z, these lines have relatively little interference from randomly placed Lyman series lines from unrelated systems. A special advantage of observing metal-line systems at low z is that one can independently determine such important parameters as the impact distance from a galaxy's center, the galaxy's morphology, kinematics and stellar content, and, finally, the nature of the galaxy's cluster environment {if any}. We have selected 3C 351 for this program because many of the redshifts of galaxies near the sight line have already been measured and the redshift is high enough to enable the detection of the O VI double t in several metal absorption systems. In addition, WFPC2 images are available from the archive.
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