X-ray Properties of a Mass-Selected Group Catalog
Abstract
The observed X-ray luminosities of groups are inconsistent with a model in which the intragroup medium is shock-heated during the collapse It is thought that a combination of pre-heating gas cooling and energy injection removes low entropy gas reducing the system s X-ray luminosity However the extent of this process is uncertain because the previous selection of group catalogs has been based on X-ray emission We have constructed a complete mass-selected catalog of 18 groups from the 2dFGRS that we proposed for observation with Chandra and XMM-Newton To date twelve these groups have been observed and here we present some preliminary results
- Publication:
-
36th COSPAR Scientific Assembly
- Pub Date:
- 2006
- Bibcode:
- 2006cosp...36..647M