Testing the Cooling Flow-Galactic Wind Paradigm in Early-type Galaxies

Hydrodynamical simulations of the hot gas in elliptical galaxies make strongpredictions on the shape of the temperature and surface brightness profiles ofthe gas depending on if the gas is cooling and flowing inward or flowing out ofthe galaxy in a wind. Xray bright galaxies (believed to be in a cooling inflowphase) are welldescribed by the models. However, to date galaxies likely to bein the outflow phase have been poorly studied due to very low Xray count rates.Here, we propose an EPICpn observation of the prototypical Xray faint galaxyNGCvirgul4697 to derive the temperature profile of the gas for the first time in anXray faint galaxy. The shape of the temperature profile will strictly test thevalidity of the current cooling flowgalactic outflow paradigm in galaxies. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]