Question 1

The highest luminosity burst of radiation observed from a pulsar is the result of _____.

Accepted Answer

A)  the pulsation of a neutron star's surface 
B)  a "hot spot" that rotates around the equator of a pulsar 
C)  a spinning beam of radiation emerging from the pulsar's poles 
D)  the rotation of an accretion disk transferring matter to the pulsar's surface 
E)  the revolution of a binary companion that eclipses the pulsar, then reveals it 
A)  the pulsation of a neutron star's surface 
B)  a "hot spot" that rotates around the equator of a pulsar 
C)  a spinning beam of radiation emerging from the pulsar's poles 
D)  the rotation of an accretion disk transferring matter to the pulsar's surface 
E)  the revolution of a binary companion that eclipses the pulsar, then reveals it

Question 2

Gamma ray bursts _____.

Accepted Answer

A)  last minutes to hours 
B)  are detected primarily in the disk of the galaxy 
C)  occur without warning 
D)  are not associated with any observable event 
E)  are detected only a few times per year 
A)  last minutes to hours 
B)  are detected primarily in the disk of the galaxy 
C)  occur without warning 
D)  are not associated with any observable event 
E)  are detected only a few times per year

Question 3

A star with a mass of 10 to 20 solar masses will produce a(n) _______________ remnant after a supernova explosion.

Accepted Answer

The answer of A star with a mass of 10...

Question 4

A compact object with a mass of 1.1 solar masses could ____.

Accepted Answer

A)  be a neutron star or a black hole 
B)  be a neutron star, but not a black hole 
C)  be a black hole, but not a neutron star 
D)  not be a black hole or neutron star 
E)  not be a black hole or neutron star. 
A)  be a neutron star or a black hole 
B)  be a neutron star, but not a black hole 
C)  be a black hole, but not a neutron star 
D)  not be a black hole or neutron star 
E)  not be a black hole or neutron star.

Question 5

The orbits of binary pulsars will get smaller because of _______________ radiation.

Accepted Answer

The answer of The orbits of binary pulsars will get...

Question 6

Gamma ray bursts are ____.

Accepted Answer

A)  too weak to affect life on Earth 
B)  an important influence on mutation and evolution 
C)  the cause of the spectacular auroras at high latitudes 
D)  triggers for solar flares and coronal mass ejections 
E)  capable of causing mass extinction events 
A)  too weak to affect life on Earth 
B)  an important influence on mutation and evolution 
C)  the cause of the spectacular auroras at high latitudes 
D)  triggers for solar flares and coronal mass ejections 
E)  capable of causing mass extinction events

Question 7

Most of the energy emitted by a pulsar _____.

Accepted Answer

A)  is carried away as a 'pulsar wind' of high-speed atomic particles 
B)  produces strong gravitational waves that radiate for several light years 
C)  ionizes the supernova remnant around the pulsar 
D)  is in the form of neutrinos 
E)  is carried away by the high-energy beam emerging from the poles of the pulsar 
A)  is carried away as a 'pulsar wind' of high-speed atomic particles 
B)  produces strong gravitational waves that radiate for several light years 
C)  ionizes the supernova remnant around the pulsar 
D)  is in the form of neutrinos 
E)  is carried away by the high-energy beam emerging from the poles of the pulsar

Question 8

What is a "hypernova," and how do they produce observable gamma ray bursts?

Accepted Answer

A star more massive than 20 solar masses

Question 9

All supernova remnants contain pulsars.

Accepted Answer

A) True 
 B)False

Question 10

What prediction does general relativity make for pulsars in a binary system?

Accepted Answer

According to Einstein's theory of genera

Question 11

A neutron star, which generates gamma-ray bursts due to "starquakes" on its surface, is called a(n) _______________.

Accepted Answer

The answer of A neutron star, which generates gamma-ray bursts...

Question 12

The laws of physics demand that a neutron star has a maximum mass of ____ solar mass(es).

Accepted Answer

A)  1 
B)  1.4 
C)  3 
D)  8 
E)  20 
A)  1 
B)  1.4 
C)  3 
D)  8 
E)  20

Question 13

The mass of a black hole concentrated in an infinitesimally small volume with zero radius, is known as a(n) _______________.

Accepted Answer

The answer of The mass of a black hole concentrated...

Question 14

X-ray bursters are caused by black holes.

Accepted Answer

A) True 
 B)False

Question 15

Neutron stars must ____.

Accepted Answer

A)  rotate very rapidly 
B)  be very luminous 
C)  have weak magnetic fields 
D)  have a mass greater than three solar masses 
E)  have about the same surface temperature as the star that created them 
A)  rotate very rapidly 
B)  be very luminous 
C)  have weak magnetic fields 
D)  have a mass greater than three solar masses 
E)  have about the same surface temperature as the star that created them

Question 16

What are the physical properties neutron stars, and how does theory predict these properties?

Accepted Answer

Neutron stars have hot surfaces, spin ra

Question 17

An X-ray burster occurs in a pulsar when ____.

Accepted Answer

A)  accreted helium suddenly fuses in a nova-like explosion 
B)  the Chandrasekhar limit is exceeded and the object collapses 
C)  carbon deflagration destroys the object 
D)  it merges with a binary companion 
E)  hydrogen fusion ignites in an accretion disk around it 
A)  accreted helium suddenly fuses in a nova-like explosion 
B)  the Chandrasekhar limit is exceeded and the object collapses 
C)  carbon deflagration destroys the object 
D)  it merges with a binary companion 
E)  hydrogen fusion ignites in an accretion disk around it

Question 18

Gamma ray bursts never last longer than a minute.

Accepted Answer

A) True 
 B)False

Question 19

Match between columns
                        Premises: Described the method of mass transfer in binary systems
Determined the density of matter needed to create a black hole
Formulated advanced theories of black holes
Determined the maximum mass of a white dwarf star
Postulated that nothing can move faster than light

Accepted Answer

The Answer of Roche and Chandrasekhar and Einstein and Schwarzschild is...

Question 20

Extremely old pulsars that have experienced large amounts of mass transfer may become _______________ pulsars.

Accepted Answer

millisecon

Exam 14: Neutron Stars and Black Holes

The highest luminosity burst of radiation observed from a pulsar is the result of _____.

Gamma ray bursts _____.

A star with a mass of 10 to 20 solar masses will produce a(n) _______________ remnant after a supernova explosion.

A compact object with a mass of 1.1 solar masses could ____.

The orbits of binary pulsars will get smaller because of _______________ radiation.

Gamma ray bursts are ____.

Most of the energy emitted by a pulsar _____.

What is a "hypernova," and how do they produce observable gamma ray bursts?

All supernova remnants contain pulsars.

What prediction does general relativity make for pulsars in a binary system?

A neutron star, which generates gamma-ray bursts due to "starquakes" on its surface, is called a(n) _______________.

The laws of physics demand that a neutron star has a maximum mass of ____ solar mass(es).

The mass of a black hole concentrated in an infinitesimally small volume with zero radius, is known as a(n) _______________.

X-ray bursters are caused by black holes.

Neutron stars must ____.

What are the physical properties neutron stars, and how does theory predict these properties?

An X-ray burster occurs in a pulsar when ____.

Gamma ray bursts never last longer than a minute.

Extremely old pulsars that have experienced large amounts of mass transfer may become _______________ pulsars.

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