Question

Neutron stars are believed to be created by

A) all types of supernovae.
B) type Ia supernovae, i.e., exploding white dwarfs.
C) explosions of main-sequence stars.
D) type II supernovae, i.e., explosions of high-mass stars.

Answer 1

Neutron stars are believed to be created by type II supernovae, i.e., explosions of high-mass stars. Type Ia supernovae can result in the formation of nova explosions or the merger of two white dwarf stars.

Step-by-step explanation:

Neutron stars are believed to be created by type II supernovae, i.e., explosions of high-mass stars.

When a white dwarf or neutron star is a member of a close binary star system, its companion star can transfer mass to it. Material falling gradually onto a white dwarf can explode in a sudden burst of fusion and make a nova. If material falls rapidly onto a white dwarf, it can push it over the Chandrasekhar limit and cause it to explode completely as a type Ia supernova. Another possible mechanism for a type Ia supernova is the merger of two white dwarfs.

Therefore, neutron stars are created through type II supernovae, while type Ia supernovae can result in the formation of nova explosions or the merger of two white dwarf stars.