BVIc light curves of 3 type II Cepheids

Light curves in the B, V, and Ic passbands have been obtained for the type II Cepheids V154 in M3 and V42 and V84 in M5. Alternating cycle behavior, similar to that seen among...研究人员已获取M3星团中V154以及M5星团中V42、V84这三颗第二类造父变星（type II Cepheids）在B、V及Ic通带下的光变曲线（light curves）。其周期交替行为，与在……中观测到的现象类似。