The gaseous halos of spiral and irregular galaxies can tell us a lot about the fundamental processes of galaxy formation and evolution, in particular feedback from supernovae on the ISM and metal-loss to the IGM. I will discuss galactic-scale outflows from starburst galaxies (superwinds) and hot halos around more normal spiral galaxies such as our own Milky-Way (which are created by either disk-fed fountains or by gas accretion from the IGM). Much of the real action in the halos of these galaxies occurs in gas with temperatures in the range 6 < log T (K) < 8, i.e. X-ray-emitting plasmas. I will therefor largely focus on the results of modern X-ray observations with Chandra and XMM-Newton of dwarf galaxies, normal and starbursting spirals and the merging ultra- luminous IR galaxies, but optical and UV studies of winds will also be discussed.
Tuesday, February 21st
Seminar is to be held at 4:00 PM in the conference room
on the second floor of Dearborn Observatory
Refreshments will be served at 3:30
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