The Host Nature and Environment of SDSS selected Mg II absorption systems

Details The Host Nature and Environment of SDSS selected Mg II absorption systems The Host Nature and Environment of SDSS selected Mg II absorption systems

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20712009c&link_type=abstract

American Astronomical Society Meeting 207, #120.09; Bulletin of the American Astronomical Society, Vol. 37, p.1362

Astronomy and Astrophysics

Astronomy

Scientific paper

We present preliminary results of an investigation into the nature and environment of Mg II absorption systems as seen in the spectra of background QSOs. Our sample is the Mg II absorbing system catalog of Prochter, Prochaska, and Burles 2004; we divide this sample by redshift and equivalent width to probe differences between populations. We use the Sloan Digital Sky Survey Data Release 4 (SDSS DR4) to find galaxies projected near the absorbing systems to within 3 arcmin. From this data we compute the galaxy-absorber angular correlation function as well as the luminosity function and colour distribution of neighbouring galaxies. Characterisitcs of candidate host systems are also considered. We discuss the interpretation of these results in terms of the halo structure of absorbing systems.

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