Institution(s): 1. Columbus State Community College, 2. Ohio State University
It is well-known that most galaxies are missing most of their baryonic mass. Perhaps more surprisingly, they also seem to be missing most of their metals. I will present Chandra, XMM-Newton and Suzaku observations probing our Milky Way halo in absorption and emission. Our results show that the Milky Way halo contains a huge reservoir of warm-hot gas that may account for a large fraction of missing baryons and metals. I’ll review current status of this field, discuss implications of our results to models of galaxy formation and evolution and outline paths for future progress.