Title:

Probing the Baryon Content of Galaxy Groups: A Radio Perspective



Eric Wilcots
University of Wisconsin



Abstract:

The current state of our understanding of the nature of the baryon content
of galaxy groups, derived largely from a large body of X-ray observations,
leaves us with two key questions. First, what are the relative fractions
of the hot, warm/hot, and neutral gas in galaxy groups, and how is each
phase distributed within groups?  Second, how has the baryon content of
galaxy groups evolved over time and what is its relationship to the
dynamical evolution of the group? The results from a number of 
investigations of the
HI content and deep searches for diffuse synchrotron emission in groups
are now shedding light on the evolution of the baryon content of galaxy
groups.  I will review recent results from these surveys and present a
roadmap for future observations.