Section 13.C

Question 1

Distinguish that a pulsar is a kind of ______

Answer 1

neutron star

Question 2

 Be able to pick what causes a pulsar to appear to pulse

Answer 2

rotation of beam of radiation coming from it

Question 3

 Recall a neutron star’s North/South poles of rotation are ____

Answer 3

not at the same spots as the North/South magnetic poles

Question 4

 If asked how fast neutron stars rotate

Answer 4

it is many times per second!

Question 5

Pick the cause for explosions of x-rays coming from a magnetar

Answer 5

strong magnetism ruptures its surface

Question 6

When you see a description for one of the ways to find a neutron or black hole, agree that you can ___

And realize that you can find the mass of that unseen object by studying the ________

Answer 6

• find a neutron star or black hole by that method.

- motion of the star it is pulling on with its gravity.

Question 7

For a nova or an x-ray binary, a disk of material (accretion disk) surrounds the severe object in the middle.

Where does material
come from to feed that disk?

Answer 7

???

Question 8

Identify the similarities and differences an X-ray binary and a Nova

Answer 8

X-ray binaries are like novae but involve neutron stars or black holes instead of white dwarfs; both involve mass transfer from another star.

 Neutron stars are compacter/stronger so bursts are more violent and more quickly repeat with higher-energy light (X-ray)

Question 9

When a neutron star or black hole pulls material off another star, magnetism can send some of the material away in ______ moving at a ________

Answer 9

• powerful jets

- significant fraction of the speed of light.