The Fe-to-Oxygen Ratio in Early-Type Galaxies with Galactic Winds

We have analyzed archived Chandra data for a sample of 18 lowluminosityearlytype galaxies and found that all of the galaxies are gas poor. The ratioof gas mass to stellar mass in these galaxies is ten times less than that foundamong more luminous galaxies, suggesting the presence of galactic winds in thesesystems.We find that Type Ia supernovae are energetically favored over AGN asthe dominant heating mechanism driving the winds. If these galaxies possessSNeIa driven galactic winds, then the Fe abundance of the hot gas should behighly super solar. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]