Binary star system

Definition

A binary star system consists of two stars that orbit around a common center of mass. These systems can significantly influence the evolution and eventual death of both stars involved.

5 Must Know Facts For Your Next Test

1. Binary star systems can exchange mass between the stars, affecting their evolution.
2. The more massive star in a binary system often evolves faster and can transfer material to its companion.
3. Type Ia supernovae occur in binary systems where a white dwarf accretes enough mass from its companion to exceed the Chandrasekhar limit.
4. Gravitational waves can be emitted by closely orbiting neutron stars or black holes in binary systems.
5. Binary interactions can lead to phenomena such as novae, X-ray binaries, and gravitational wave events.

Review Questions

• What is a binary star system?
• How does mass transfer between stars affect their evolution in a binary system?
• What astronomical event can result from a white dwarf in a binary star system exceeding the Chandrasekhar limit?

Related terms

Supernova: An exploding star that has reached the end of its life cycle, often resulting from processes in binary systems.

Chandrasekhar Limit: The maximum mass (~1.4 solar masses) that a white dwarf can have before collapsing into a neutron star or black hole.

Gravitational Waves: Ripples in spacetime caused by accelerating masses, such as merging neutron stars or black holes in binary systems.