Astronomers from India have conducted a long-term photometric variability survey of an open cluster known as NGC 559. As a result, they detected 70 new variable stars in the field of this cluster. The finding is presented in a paper published September 15 on the arXiv pre-print repository.
Star clusters offer excellent opportunities to study stellar evolution as they are collections of stars with similar properties, for instance, age, distance and initial composition. In particular, astronomers often search for variable stars in young and intermediate-age clusters, which could be crucial in advancing the understanding of pre-main-sequence (PMS) stars, and therefore the initial phases of