Unformatted text preview: urbed inward, orbit at an
angular velocity faster than that of the “guiding center?” HINT: The
forces mentioned in (a) are radial, why is this critical?
c. Why would a star, in the rotating frame, if perturbed outward from this
“guiding center,” experience a restoring force pulling it back toward
smaller orbits? Inversely, when the star is perturbed inward from the
“guiding center,” why does it experience a restoring force pushing it back
outward toward larger orbits?
d. Explain how the effects described in (b) and (c) explain why we would
expect stars perturbed from perfectly circular orbits to exhibit ep...
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- Spring '14
- Andromeda Galaxy, perfectly circular orbit