In some cases,a supernova in a binary system may lead to the eventual formation of an accretion disk around the remains of the star that exploded.All of the following statements about such accretion disks are true except
A)X-rays are emitted by the hot gas in the accretion disk.
B)the accretion disk consists of material that spills off the companion star.
C)the central object about which the accretion disk swirls may be either a neutron star or a black hole.
D)several examples of flattened accretion disks being "fed" by a large companion star can be seen clearly in photos from the Hubble Space Telescope.
E)the radiation from an accretion disk may vary rapidly in time.

Question

Quizplus · Accepted Answer

The statement "several examples of flattened accretion disks being 'fed' by a large companion star can be seen clearly in photos from the Hubble Space Telescope" is not true. While accretion disks around neutron stars and black holes have been observed with the Hubble Space Telescope, they are not typically fed by a large companion star. Instead, the material in the accretion disk comes from the original companion star or from the expanding debris of the supernova explosion.

In Some Cases,a Supernova in a Binary System May Lead