New Galaxies Discovered in the First Blind H i Survey of the Centaurus A Group

Abstract

We have commenced a 21 cm survey of the entire southern sky (δ<0^deg, -1200 km s^-1 -13.0), low surface brightness dwarf galaxies with H I profile line-widths suggestive of dynamics dominated by dark matter. The new group members add approximately 6% to the H I mass of the group and 4% to its light. The H I mass function, derived from all the known group galaxies in the interval 10^7 M_solar