Supernova explosion and loss of baryonic matter in a dark halo

The feedback effect of supernova explosions on dwarf galaxies in the cold d ark matter dominated universe is studied. A mass loss model of galaxies and a method of comparing the model with observations are developed. It is fou nd that when a galaxy is surrounded by a dark halo, the mass loss caused by supernova explosions is severely restricted, but not as severely as was ex pected. if we assume the collapse redshift to be z = 2 similar to 8, the mo del agrees with the observations for the range of parameters chosen, and in dicates that less massive galaxies are formed first.