Period analysis of 7 field RRab stars

Using the times of light maximum collected from the GEOS RR Lyrae database and determined from sky surveys, we utilize the O-C method to study the period variations of seven...本研究利用从GEOS天琴座RR型变星（RR Lyrae）数据库中获取、且经天文巡天观测确定的光变极大时刻数据，采用O-C（观测减计算，Observation minus Calculation）方法对7颗……的周期变化展开研究。