Suzaku Observations of the X-ray Brightest Galaxy ESO3060170
Abstract
In the hierarchical Universe, groups are regarded as the building blocks of clusters of galaxies. Yet groups differ from clusters in their baryon fractions, iron mass-to-light ratios, and various global scaling relations. Fossil galaxy groups, each dominated by a relatively isolated giant elliptical galaxy, have many properties intermediate between regular groups and clusters of galaxies. We observed the X-ray brightest fossil group ESO3060170 out to its virial radius, with the Suzaku X-ray Observatory, in order to better elucidate the relation between fossil groups, normal groups, and clusters. We find that the gaseous entropy and pressure profiles in the outer regions are flatter than found in numerically simulated clusters. This may indicate that the gas is clumpy, as found in some massive clusters, and/or the gas has been redistributed outwards.
- Publication:
-
American Astronomical Society Meeting Abstracts #221
- Pub Date:
- January 2013
- Bibcode:
- 2013AAS...22112803S