PHATTER M33 Cepheids HST phot. & distances

We present a low-dispersion period-luminosity relation (PL) based on 154 Cepheids in Messier 33 (M33) with Hubble Space Telescope (HST) photometry from the PHATTER survey. Using...我们基于三角座星系（Messier 33，M33）中的154颗造父变星（Cepheids），结合哈勃空间望远镜（Hubble Space Telescope，HST）在PHATTER巡天项目中获取的测光数据，提出了一条低弥散度周光关系（period-luminosity relation，PL）。