Study Questions Week 5  Astronomy 104: Stellar Astronomy Fall 2002

What is the HR diagram? Sketch an HR diagram, label the regions, and label the axes.

What two equivalent quantities are plotted on the horizontal axis of the HR diagram? What two equivalent quantities are plotted on the vertical axis of the HR diagram?

Explain how luminosity classification works. Know the luminosity classes.

What is spectroscopic parallax? How does it work? What does it tell us?

What are Kepler=s three laws of Planetary motion? Where are they valid?

How did Netwon modify Kepler=s third law? Where is the modified form valid?

What are the two forms of Kepler=s third law as modified by Newton? Be sure you know what units are appropriate and necessary for each.

How do we determine the masses of stars?

What is the mass-luminosity relation? For what type of stars does it apply?

What is the mass-radius relation? For what type of stars does it apply?

What is the mass-lifetime relation? For what type of stars does it apply?

How is mass related to other stellar properties?

Describe the different types of binary systems.

Review and Discussion:

Chapter 2: 9, 14, 15, 19, 20

Chapter 17:  6,  11, 12, 13, 14, 15, 16, 17, 18, 19

Study questions from other weeks:

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