Investigation of the origin of E+A(post-starburst) galaxies

这个星系，也就是所谓的E+A星系(或后星爆星系)，是一个在几千万年前处于恒星暴发，然后突然停止恒星形成的星系群。我们的目的是通过观察了解它们的物理起源，并获得新的见解。在星系团环境中，许多星系都是星系团，这意味着恒星形成的停止是由于低质量星系中的气体剥离造成的。同时，我们在外场环境下对其中一个有恒星形成区和后恒星爆发区的星系对进行了定量的讨论。

The galaxy so-called E+A galaxy(or post-starburst galaxy) is a population which was in starburst several ten Mega years ago and then suddenly stopped the starformation. We aimed to understand their physical origin throughobservation, and obtained new insights. In cluster environment, wheremany galaxies are clustered, it is implied that the stop of the starformation is caused by a gas stripping in low mass galaxies. Meanwhile, we made a quantitative discussion of galaxy pair one of which has a starforming region and a post-starburst region in it in field environment.