Abstract:
Compact groups of galaxies are systems of typically four or five galaxies in close
proximity to one another. Due to this proximity, galaxies in groups have interacted with
each other extensively. As result their morphology as well as the distribution of
galaxy type differs substantially from what is observed among populations of galaxies in
the field. The Hickson Compact Groups (HCGs) is a sample of 100 groups selected with well
defined criteria which have been studied extensively in various wavelengths. Here we
present the first analysis of spatially resolved 12micron mid-infrared properties of
galaxies in 35 HCGs using archival data obtained with the Infrared Space Observatory. We
estimate the star formation rates of the groups, quantify their dust content as a
function of galaxy type, and contrast our results with the optical properties and
molecular gas content of the systems.