Author Question: The unified model describes active galactic nuclei using a. a supermassive black hole at the ... (Read 77 times)

jeatrice · **on:** Jul 27, 2018

The unified model describes active galactic nuclei using

a. a supermassive black hole at the center of a normal spiral galaxy.
b. a supermassive black hole surrounded by an accretion disk and dense disk of gas.
c. an accretion disk around a neutron star.
d. gravitational lenses to intensify the radiation coming from them.
e. different lines of sight toward and dwarf irregular galaxy.

Question 2

A Type Ia supernova is believed to occur when

a. the core of a massive star collapses.
b. hydrogen detonation occurs.
c. a white dwarf exceeds the Chandrasekhar limit.
d. the cores of massive stars collapse.
e. neutrinos in a massive star become degenerate and form a shock wave that explodes the star.