Show:
Supergiants
High Mass Death
Type II Supernovae
Neutron stars and BH
Special Relativity
100

The reason stars leave the main sequence

What is hydrogen is used up in the core?

100
This happens when a high-mass star has an iron core.
What is fusion stops?
100
Causes shock wave that results in Type II supernova.
What is core bounce (core stops collapsing, because dense enough for atoms to repel, and bounces back)?
100
Property of a neutron star that gives it its name.
What is neutron degenerate?
100
The only speed that does not depend on the motion of the observer.
What is the speed of light?
200

This stays the same as a high-mass star expands and cools after leaving the main sequence.

What is luminosity?

200
Carries away energy quickly, so that fusion of each new element in the core of a supergiant is shorter than the last.
What is neutrino cooling?
200
Left after a Type II supernova explosion.
What is dense core of the star (neutron star or black hole)?
200
Emitted by a red giant and neutron star binary.
What is X-rays? This is called an X-ray binary.
200
Einstein's fourth dimension.
What is time?
300

Direction high mass stars move on the HR diagram after leaving the main sequence?

What is right?

300
High mass stars can't fuse iron because it _______ energy.
What is requires? Fusion of lighter elements MAKES energy.
300
These are made in supernova explosion.
What are new elements? Most elements heavier than iron are made this way.
300
Rapidly rotating neutron star.
What is a pulsar?
300
This can go faster than the speed of light.
What is nothing?
400

Type of fusion occurring in the core of supergiants when they first leave the main sequence.

What is helium fusion?

400
Starts core collapse in high mass stars.
What is no fusion? No fusion means no energy produces and no pressure to balance gravity in the core.
400
Triggered by supernova shock wave heating and compressing interstellar gas.
What is star formation?
400
Source of gamma ray bursts.
What are magnetars?
400
E=mc2 tells us that mass and energy are _________.
What is the same?
500

A new one is added every time a new element begins fusing in the core of a supergiant.

What is a fusion shell? Supergiants can have many different types of fusion shells.

500
Physical properties of the core that increase as collapse accelerates.
What are gravity, density and temperature?
500
Type II supernova leave behind __________. Type Ia supernova leave behind __________.
What is neutron star and nothing?
500
Two ways black holes can form.
What are (1)Type II supernova and (2)binary accretion? (1) original star must be massive enough (2) binary of neutron star and giant, where neutron star pulls mass off giant
500
When an object is in motion it is ______ than at rest.
What is shorter?