Question 1 Seyfert
1 galaxies show very broad emission lines, while Seyfert 2 galaxies show narrower emission
lines. What do astronomers
think the reason is?
a.Seyfert
1 galaxies have bigger black holes than Seyfert 2 galaxies.
b.Seyfert 1 galaxies have smaller black holes than
Seyfert 2 galaxies.
c.Seyfert
1 galaxies have radio jets and Seyfert 2 galaxies don't.
d.Seyfert 1 galaxies are actively accreting fuel and
tidally disrupting stars,
and Seyfert 2 galaxies are not.
e.Seyfert 1 galaxies' cores are seen
directly, while the centers of Seyfert 2 galaxies are hidden from our perspective by a dense
torus of gas and
dust.
This is the basic point of the unified model of Seyfert galaxies.