AAS 205th Meeting, 9-13 January 2005
Session 147 Groups and Clusters of Galaxies
Poster, Thursday, January 13, 2005, 9:20am-4:00pm, Exhibit Hall

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[147.04] The Fossil Group NGC 1132

J. S. Arabadjis, E.-H. Peng, E. D. Miller, M. W. Bautz (MIT), G. M. Garmire (Penn State)

We present a mass profile of the fossil group NGC 1132. Using a deprojection analysis of Chandra imaging spectroscopy we derive plasma temperature and density profiles, and under the assumption of hydrostatic equilibrium we calculate the total gravitating mass. We examine the validity of the hydrostatic hypothesis using maps of the projected temperature, electron density, pressure, and entropy of the group plasma, and estimate the effect of departures from equilibrium on the measurment of its mass.

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© 2004. The American Astronomical Society.