Title:  A Census of Poor Groups:  Hot Gas, Cold Gas, and Galaxies

Ann Zabludoff
University of Arizona


Abstract:
 
Poor groups are the repositories of most of the baryons in the nearby
universe.  However, until recently, little was known about these
common environments outside of our own Local Group.  I will review the
results of new surveys of the gas and galaxies in poor groups with an
emphasis on the relationship between the evolution of group galaxies
and the intragroup medium.  I will also discuss on-going work to
address some of the outstanding questions, including why groups are so
common given that the galaxy-galaxy merger timescales are shorter than
in other environments, what fraction of group baryons are in hot
vs. cold gas, and what the galaxy populations of groups tell us about
the evolution of galaxies in rich clusters.