Delta Scuti variables are a type of pulsating star that exhibit changes in brightness due to periodic expansions and contractions of their outer layers. These stars are typically located in the Milky Way and are often found in the Scutum constellation, which is where they get their name. They are usually young, hot, and have masses similar to or greater than that of the Sun. The variability in brightness occurs over short periods, ranging from a few hours to a couple of days. This pulsation is driven by stellar pulsation mechanisms, specifically the kappa mechanism, which involves changes in opacity within the star's layers. Delta Scuti variables are important for studying stellar evolution and the internal structure of stars.