The Dark Matter and Baryon Content of Isolated Elliptical Galaxies

The mass profiles of elliptical galaxies are important probes of galaxyformation and cosmology. Only a few elliptical galaxies have detailed massmeasurements from Xrays because of the lack of suitable targets in terms oftotal mass (< virgul10^{13} m_sun) and relaxed dynamical states appropriate forhydrostatic analysis. In previously awarded XMM and Chandra snapshot programs tosearch for optimal targets for Xray studies of mass profiles on the galaxyscale, we have identified several promising isolated elliptical galaxies. Werequest followup observations with XMM to map the detailed profiles of stars,dark matter, and hot gas in two of these galaxies. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]