Optical High-Resolution Spectroscopy of High-Redshift BAL Quasars

Details Optical High-Resolution Spectroscopy of High-Redshift BAL Quasars Optical High-Resolution Spectroscopy of High-Redshift BAL Quasars

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jena.confe..54j&link_type=abstract

"JENAM-2007, "Our non-stable Universe", held 20-25 August 2007 in Yerevan, Armenia. Abstract book, p. 54-54"

Computer Science

Scientific paper

We present high-resolution optical spectroscopy of two high-redshift BAL quasars, 0844+0503, at redshift z=3.3465, which has a known radio counterpart observed by the VLA FIRST Survey, and 0908+0658, at redshift z=3.0734, with no radio detection recorded in the NED/IPAC extragalactic database. They show velocity structure on a scale smaller than the separations of the two components in prominent doublets (CIV, SiIV, NV). Comparison of the residual intensities in the two components have allowed us the covering factor and the column densities of several species of the absorbing gas to be measured. Ionisation parameters have been also determined.

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