Galaxies in the Local Volume: Star formation history and SED fitting

Benjamin Johnson (IAP)

Galaxies in the local volume (D<10Mpc) present an excellent laboratory for studying in detail the star formation activity of galaxies in extreme conditions -- low mass, low density, low metallicity, and low star formation rate. Recent work has highlighted a puzzling discrepancy in the H-alpha and UV derived star-formation rates of such galaxies that may hint at changes to the IMF. I will discuss the types of star formation history required to explain the distribution of H-alpha and UV ratios in nearby galaxies as well as the results of fitting the UV through FIR SED of these galaxies to typical population synthesis models.