Other
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106..848d&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 106, no. 3, p. 848-868.
Other
13
Absorption Spectra, Magnesium, Quasars, Astronomical Catalogs, Astronomical Photometry, Astronomical Spectroscopy, Gravitational Effects, Image Analysis, Red Shift
Scientific paper
The results of a large R-band imaging survey of 71 bright ( mV less than 18) quasars are presented. The quasars were chosen from published samples which have intermediate resolution optical spectroscopy available, so the presence of low redshift Mg II absorption lines can be determined. We have searched our data for galaxies close to the line-of-sight to the quasars, which we might be able to identify with the absorption systems. We find a high coincidence between galaxies very near the line-of-sight and quasars showing absorption systems in their spectra, a result consistent with other studies. These galaxies have a mean luminosity of 0.5 L* (assuming they lie at the absorption redshift). The distribution of impact parameters between the galaxies and the quasars extends with a flat distribution to large radii (greater than 30/h kpc). This suggests that the absorption systems may not be gravitationally bound to the observed galaxies, but may be part of larger extended systems.
Drinkwater Michael. J.
Thomas Peter A.
Webster Rachel L.
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