Intermediate-Redshift Groups in the XBootes Survey: First Results From Suzaku and Chandra

Details Intermediate-Redshift Groups in the XBootes Survey: First Results From Suzaku and Chandra Intermediate-Redshift Groups in the XBootes Survey: First Results From Suzaku and Chandra

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...21115805m&link_type=abstract

American Astronomical Society, AAS Meeting #211, #158.05

Physics

Scientific paper

Galaxy groups are key tracers of galaxy evolution, cluster evolution, and structure formation, yet they are difficult to study at even moderate redshift. We have undertaken a project to observe a flux-limited sample of intermediate-redshift (0.1 < z < 0.5) group candidates identified by the XBootes Chandra survey. By exploiting the unique multi-wavelength coverage of the XBootes/NOAO Deep Wide Field Survey (NDWFS) field, we aim to (1) understand the physical connection between the X-ray and optical properties of groups, and (2) constrain non-gravitational physics that alter the energetics of the intragroup medium. Here we present deep Suzaku/XIS and Chandra/ACIS follow-up observations of the first four targets in this project, spanning a redshift range of 0.19 to 0.34. All four are confirmed sources of diffuse, thermal emission with derived temperatures between 1.5 and 2.5 keV, abundances between 0.3 and 0.7 solar, and bolometric X-ray luminosities between 1043 and 1044 erg/s. The properties of these massive groups/poor clusters are consistent with observed cluster scaling relations. We will discuss these early results in the context of group and cluster evolution.

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