AAS 203rd Meeting, January 2004
Session 122 Antenna Galaxies
Poster, Thursday, January 8, 2004, 9:20am-4:00pm, Hanover Hall

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[122.06] Energetics and Composition of Hot Plasma in the Antennae

J.C. Raymond, A. Baldi, G. Fabbiano, A. Zezas (CfA), F. Schweizer (STScI), T.J. Ponman, A.M. Read (U. Birmingham), A.R. King (U. Leicester)

We use the parameters of the diffuse X-ray emitting gas in the Antennae derived from Chandra observations by Baldi et al. to examine the heating and cooling rates of the plasma. We consider radiative cooling, thermal conduction and adiabatic expansion, and we compare with published values of magnetic field strength and H I column density. We find that the observed elemental composition enhancements are consistent with the enrichment expected for Type II supernovae that heat the gas. We also find that static models that emphasize the role of thermal conduction cannot be scaled to the conditions in the Antennae. This work was supported by NASA contract NAS8-39073 (CXC) to the Smithsonian Institution.

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© 2003. The American Astronomical Soceity.