RR Lyrae variables in 2 fields in M31 spheroid
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We present Hubble Space Telescope observations taken with the Advanced Camera for Surveys Wide Field Channel of two fields near M32 - between 4 and 6kpc from the center of M31....
本研究呈现了利用哈勃空间望远镜（Hubble Space Telescope）搭载的高级巡天相机（Advanced Camera for Surveys）宽视场通道（Wide Field Channel）获取的观测数据，其观测对象为两个位于M32附近、与M31星系中心距离介于4至6千秒差距（kpc）之间的天区……
