Other
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6589h&link_type=abstract
HST Proposal ID #6589
Other
Hst Proposal Id #6589 Qso Absorption Lines
Scientific paper
We will combine HST FOS and GHRS observations with ground-based Keck Observatory spectra of several QSOs with knownza~ze absorption lines to (1) derive elemental abundances, (2)test the hypothesis that za~ze systems are physically relatedto the QSOs, and (3) study the physical nature of za~zeregions and their relationship (if any) to other QSOphenomena, such as the X-ray warm absorbers and broad emissionlines. The abundance derivations are our ultimate goal becauseof the broad implications for the formation and evolution ofgalaxies. Several recent studies suggest that themetallicities in near-QSO environments are often above solar,with a possible trend for higher metallicities at higherredshifts and/or QSO luminosities. The za~ze absorption lineshave not yet been fully utilized in this regard, but theycould be the best probes available for deriving metalabundances near the centers of high redshift galaxies. HSTspectra are required to measure important diagnostic lines inthe UV, while the Keck observations (at ~8 km/s resolution)will vastly improve upon existing data for lines accessiblefrom the ground. The combined data will yield the bestavailable measurements of the velocities, column densities andrange of ionizations in za~ze systems. We will deriveabundances from these data using detailed models of theionization in each line forming environment.
No associations
LandOfFree
Associated Absorption Lines in QSOS does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Associated Absorption Lines in QSOS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Associated Absorption Lines in QSOS will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1117950