Spectroscopy and HST photometry in Westerlund 2
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We present a spectroscopic and photometric determination of the distance to the young Galactic open cluster Westerlund 2 using WFPC2 imaging from the Hubble Space Telescope...
本研究借助哈勃空间望远镜(Hubble Space Telescope)的WFPC2成像数据,对年轻银河疏散星团Westerlund 2的距离进行了光谱学与光度学测定……



