Gamma-ray burst

Definition

A gamma-ray burst (GRB) is an extremely energetic explosion observable in distant galaxies, emitting intense gamma radiation. They are the brightest electromagnetic events known to occur in the universe, lasting from milliseconds to several minutes.

5 Must Know Facts For Your Next Test

1. Gamma-ray bursts can be categorized into short-duration and long-duration GRBs based on their length.
2. Long-duration GRBs are associated with the collapse of massive stars into black holes.
3. Short-duration GRBs are believed to result from the merger of binary neutron stars or a neutron star and black hole.
4. The afterglow of a GRB can emit X-rays, visible light, and radio waves following the initial gamma-ray emission.
5. The discovery of GRBs has provided crucial insights into high-energy astrophysical processes and stellar evolution.

Review Questions

Related terms

Supernova:

A powerful and luminous explosion that occurs at the end of a massive star's lifecycle.

Neutron Star:

A dense stellar remnant left after a supernova, consisting mostly of neutrons.

Black Hole:

A region of space where the gravitational pull is so strong that nothing, not even light, can escape from it.