Physics
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..marb31002l&link_type=abstract
American Physical Society, Annual APS March Meeting 2003, March 3-7, 2003, , abstract #B31.002
Physics
Scientific paper
I will be focussing on the comparison between two major catalogues of quasar absorption line systems to better understand the geometry of quasar ejecta. Each of the two catalogues that I will be drawing from contains a statistical sample of over 1000 QSOs. The smaller of the two is a compilation of QSO absorption line system data from published literature over the past 15 years. The larger Â- and still growing Â- second catalogue is comprised of data from the Sloan Digital Sky Survey. After dividing the data of both catalogues into high, low, and mixed ionization systems, various plots should indicate selection effects of the two catalogues as well as trends in the data itself. A dN/dâ histogram is an indication of the number of systems versus velocity. This plot should be used to distinguish quasar ejecta from more distant absorbing galaxies and further demonstrate any statistical differences in their compositions. I will be focussing on the comparison between two major catalogues of quasar absorption line systems to better understand the geometry of quasar ejecta. Each of the two catalogues that I will be drawing from contains a statistical sample of over 1000 QSOs. The smaller of the two is a compilation of QSO absorption line system data from published literature over the past 15 years. The larger - and still growing - second catalogue is comprised of data from the Sloan Digital Sky Survey. After dividing the data of both catalogues into high, low, and mixed ionization systems, various plots should indicate selection effects of the two catalogues as well as trends in the data itself. A dN/dâ histogram is an indication of the number of systems versus velocity. This plot should be used to distinguish quasar ejecta from more distant absorbing galaxies and further demonstrate any statistical differences in their compositions.
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