Type II supernova

Definition

A type II supernova is a powerful explosion that occurs when a massive star exhausts its nuclear fuel and its core collapses. This leads to the ejection of the star's outer layers into space.

5 Must Know Facts For Your Next Test

1. Type II supernovae are characterized by the presence of hydrogen lines in their spectra.
2. They are typically associated with stars that have at least 8 times the mass of the Sun.
3. The core collapse results in either a neutron star or a black hole, depending on the residual mass.
4. Type II supernovae play a crucial role in dispersing heavy elements throughout the galaxy.
5. These supernovae can outshine entire galaxies for brief periods.

Review Questions

• What spectral feature distinguishes a Type II supernova from other types?
• What is left behind after a Type II supernova event?
• Why are Type II supernovae important for galactic chemical evolution?

Related terms

Neutron Star:

A dense stellar remnant composed primarily of neutrons, often formed after a supernova explosion.

Black Hole:

An object with gravitational pull so strong that nothing, not even light, can escape from it, potentially formed from very massive stellar remnants.

Stellar Nucleosynthesis:

The process by which elements are created within stars through nuclear fusion reactions.