Astr 328 Midterm Exam Questions
There will be three questions taken
from this list. You should plan on spending ~ 2-3 bluebook pages
answering each one.
- You are interested in studying the structure of
galaxy believed to be roughly at the distance of the Virgo cluster, but
need a good distance measurement first. What are the possible
and which would you choose? Why?
- Describe how Type Ia supernovae can be used as a
distance indicator. Be sure to describe the physical processes involved.
- Explain how the Sunyaev-Zeldovich effect is used
the Hubble constant, and discuss sources of uncertainty.
- Write down the Freidman equation, and describe
each term. Using the Friedman equation, derive the following
for an Omega=1, Lambda=0 universe.
Explain the test behind the supernova cosmology
and the recent results from this project.
- the current age of the Universe
Describe what we mean by "peaks" in the power
the microwave background. What causes these peaks, and what do they
us about the Universe?
Describe how globular cluster ages are
determined, and how these ages constrain the cosmological parameters
which describe the universe. Be specific!
Describe the four classical tests of cosmology,
and what data you might need for each one. Explain which of the tests,
if any, are providing good tests of cosmology today.
Describe the Tully-Fisher relationship (including
its physical implications). Discuss the data you need to measure H0
with Tully-Fisher, and explain how the cluster incompleteness bias can
influence your answer.
Describe the five foundations of modern