If you have two stars that are both smaller than their Roche Lobes, then that type of binary is referred to as a detached binary, and the stars will not have a direct influence on each other's evolution. ... This system is referred to as a semi-detached binary.

What occurs in a binary star system?

Binary stars are two stars orbiting a common center of mass. The brighter star is officially classified as the primary star, while the dimmer of the two is the secondary (classified as A and B respectively). In cases where the stars are of equal brightness, the designation given by the discoverer is respected.

What are binary stars quizlet?

Binary Star. 2 stars in orbit about their common center of mass, held by their mutual gravitational pull.