Astr 328 Midterm Exam Questions
There will be three questions taken
from this list. You should plan on spending ~ 23 bluebook pages
answering each one.
 You are interested in studying the structure of
an elliptical
galaxy believed to be roughly at the distance of the Virgo cluster, but
need a good distance measurement first. What are the possible
techniques,
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 SunyaevZeldovich effect is used
to measure
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.
 R(t)
 t(z)
 the current age of the Universe

Explain the test behind the supernova cosmology
project,
and the recent results from this project.
 Describe what we mean by "peaks" in the power
spectrum of
the microwave background. What causes these peaks, and what do they
tell
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 TullyFisher relationship (including
its physical implications). Discuss the data you need to measure H0
with TullyFisher, and explain how the cluster incompleteness bias can
influence your answer.
 Describe the five foundations of modern
cosmology.