Linking star formation and environment in supercluster galaxies

Details Linking star formation and environment in supercluster galaxies Linking star formation and environment in supercluster galaxies

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ogci.conf..390g&link_type=abstract

Outskirts of Galaxy Clusters: Intense Life in the Suburbs. Edited by Antonaldo Diaferio, IAU Colloquium #195, p.390-393

Physics

Scientific paper

We present a unique multiwavelength dataset of the Abell 901/902 supercluster at z=0.16. The environment of the structure is well characterized by weak lensing analysis, galaxy dynamics, and X-ray imaging, and we examine how galaxy properties correlate with these measures of environment. We examine the star-formation-density relation and find a surface mass density threshold above which star-formation in supercluster galaxies is truncated, and that this transformation affects primarily the faint end of the star-forming galaxy population (down to M*+6). In addition, we present a preliminary dynamical analysis of the spectroscopic sample (n˜ 300 galaxies), revealing a bimodal distribution of galaxy velocities and significant substructure.

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