Period Variation Rates of Four Radial Single-Mode High-Amplitude Delta Scuti Stars

Tian-Fang Ma, Jia-Shu Niu, Hui-Fang Xue

In this work, we present a study on the long time-scale period variations of four single-mode high-amplitude delta Scuti stars (HADS) via the classical $O-C$ analysis. The target H…