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Study Guide for Exam 4.pdf - Study Guide for Exam 4 Chapter...

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Study Guide for Exam 4Chapter 22What is a rotation curve ?
What would we expect the rotation curve of galaxies (including our own) to look like ?
What observations do we use to establish the rotation curves of spiral galaxies ?
What do they actually look like ?
What hypothetic component is supposedly responsible for this behavior ?
What percentage of our galaxy is made of dark matter (in mass) ?
Where is dark matter located in galaxies ?
What happens when we compare the mass we see and the mass derived through Kepler’smethod within the Sun’s orbit ?
Does this mean we know the mass of the Milky Way precisely now ?
What are the three main pieces of evidence for the existence dark matter ? Try to summarizeeach ofthem.
How do we know elliptical galaxies also have dark matter?
What are the three main hypotheses on the nature of dark matter ? How much would theyaccount for-WIMP - weakly interacting massiveparticles.what we are observing ?
What is the name of the galaxy group the Milky Way belongs to ?

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Term
Spring
Professor
Baron

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