HST photometry of 55 cepheids in M31

We present period-luminosity relations (PLRs) for 55 Cepheids in M31 with periods ranging from 4 to 78 days observed with the Hubble Space Telescope using the same three-band...本工作给出了M31内55颗造父变星的周光关系（period-luminosity relations，PLRs），这些天体的周期介于4至78天之间，由哈勃空间望远镜（Hubble Space Telescope）采用相同的三波段……观测得到。