Mass loss

Definition

Mass loss is the process by which a star loses its mass over time, primarily through stellar winds and other ejection mechanisms. This phenomenon significantly influences the star's evolution and eventual end state.

5 Must Know Facts For Your Next Test

1. Mass loss occurs in various stages of a star's life, particularly during the red giant and supergiant phases.
2. Stellar winds are a primary driver of mass loss, especially for massive stars with strong radiation pressure.
3. The rate of mass loss can affect a star's lifespan and its transition to subsequent evolutionary stages.
4. Massive stars lose more mass compared to low-mass stars, impacting their final fates as supernovae or black holes.
5. Observing mass loss helps astronomers understand the chemical enrichment of the interstellar medium.

Review Questions

• What are the primary mechanisms responsible for stellar mass loss?
• How does mass loss impact the lifespan and evolution of a star?
• Why do massive stars experience higher rates of mass loss compared to low-mass stars?

Related terms

Red Giant:

A late stage in a star's life where it expands significantly and begins losing mass through stellar winds.

Stellar Wind:

A flow of charged particles ejected from the outer layers of a star, contributing to its mass loss.

Supernova:

A powerful explosion marking the death of a massive star, often influenced by prior significant mass loss.