Cepheids in M101 observed with HST

We accurately determine a new Cepheid distance to M101 (NGC 5457) using archival Hubble Space Telescope (HST)/Advanced Camera for Surveys V and I time series photometry of two...本研究借助存档的哈勃空间望远镜（Hubble Space Telescope, HST）高级巡天相机（Advanced Camera for Surveys, ACS）获取的两组V波段与I波段时序测光（time series photometry）数据，针对M101（NGC 5457）精确测定了新的造父变星（Cepheid）测距结果。