X-ray bursters occur in binary star systems. What two types of stars (objects) could make an X-ray burster?

Question

a) A white dwarf and a black hole
b) Two main sequence stars in a mass transfer binary
c) Two neutron stars
d) A giant or supergiant star and a neutron star in a mass
transfer binary
e) Two black holes

Answer 1

The answer is d) a giant or supergiant star and a neutron star in a mass transfer binary. The gas from the giant or supergiant star accumulates on the neutron star until there is enough for a sudden explosion in x-rays.