XMM-Newton Proposal 02017516

Details XMM-Newton Proposal 02017516 XMM-Newton Proposal 02017516

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop...94m&link_type=abstract

XMM-Newton Proposal ID #02017516

Computer Science

2Pi0.060J0225.5-293, 2Pi0.086J1309.4-013, 2Pi0.050J0024.8-330, 2Pi0.095J1013.9-000, 2Pi0.058J2227.0-304, 2Pi0.068J0311.8-265, 2Pi0.083J1302.9-023, 2Pi0.084J1312.2-010, 2Pi0.068J0315.5-290, 2Pi0.074J1123.0+010, 2Pi0.071J0035.8-272, 2Pi0.081J1327.3+011, 2Pi0.084J1319.3-005, 2Pi0.096J1004.1-020, 2Pi0.082J1330.6+012, 2Pi0.077J2318.0-281, Xmm-Newton Proposal 02017516

Scientific paper

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 groups from the 2dFGRS. X-ray observations of this sample would for the first time provide accurate determinations of the entropy in a mass-selected sample. These observations are of key importance for understanding the thermal history of the intragroup medium and the interplay between X-ray cooling and galaxy formation.

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