Mass transfer in binaries

Mass transfer in binary star systems occurs when two stars orbit each other closely. One star may expand and lose material, which can flow toward its companion through gravitational attraction. This process alters the stars' masses and can lead to various phenomena, such as the formation of accretion disks around one star. Mass transfer affects the stars' evolution, potentially causing one to become a red giant or triggering explosive events, like nova or supernova. Ultimately, it highlights the dynamic interactions in space that shape the lifecycle of stars.