Probing cluster galaxies with background QSOs

Details Probing cluster galaxies with background QSOs Probing cluster galaxies with background QSOs

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009rmxac..35..229l&link_type=abstract

XII Latin American IAU Regional Meeting (Eds. G. Magris, G. Bruzual, & L. Carigi) Revista Mexicana de Astronomía y Astrofísica (

Statistics

Galaxies: Clusters: General, Quasars: Absorption Lines

Scientific paper

We present the results of the first survey of intervening Mg 0 absorption systems associated with high-z cluster galaxies. We investigated the incidence (dN/dz) of Mg 0 absorbers in < z > = 0.6 cluster galaxies from the Red-Sequence Cluster Survey. While strong (W[0] > 1.0 Å) absorbers show a significant excess (up to 10×), weak (W[0] < 0.3 Å) absorbers conform to the field statistics. We argue that this dichotomy could be explained if cluster galaxies that give rise to weak Mg 0 absorption have their cold halos truncated as a consequence of environmental effects.

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