Unformatted text preview: icyclic
motion in a rotating frame rotating at the angular velocity of the perfectly
circular orbit.
5. Explain, in English, why if the epicyclic frequency of a star is equal to some
integer multiple of the frequency at which it encounters spiral arms, the star
– Page 2 of 3 – would experience “resonant forcing”?
6. [C&O 25.14 (extensively tweaked)] In example 25.3.1 in the textbook, Carroll
and Ostlie work out the epicyclic frequency of the Sun, κ0.
Using that
information along with what we know about the Sun’s velocity relative to the
LSR (velocity components given in equations 24.33 to 24.35), work out the
amplitude AR of the Sun’s radial...
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 Spring '14
 Dr.JuanCabanela
 Andromeda Galaxy, perfectly circular orbit

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