Old star clusters in NGC 4449 from HST imaging

We use Hubble Space Telescope imaging to show that the nearby dwarf starburst galaxy NGC 4449 (=UGC 7592) has an unusual abundance of luminous red star clusters. Joint...我们利用哈勃空间望远镜(Hubble Space Telescope)的成像观测数据证实，邻近矮星暴星系NGC 4449（即UGC 7592）拥有异常丰富的亮红色恒星星团。Joint...