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Unformatted text preview: l be ready to go. NOTE: For this problem set, unless directed otherwise,
please assume the IAU values for Sun’s rotational velocity,
Θ0 = 220 km/s, and galactocentric radius, R0 = 8.5 kpc. – Page 1 of 4 – 1. [Variant of Problem
2 .19 from Sparke
and Gallagher] The
G a l a x y ’s n e u t r a l
hydrogen (HI) disk
extends outward to
about 2.5R0. From the
curve of the galaxy,
show that the mass
11M [start with
e quation (24.49)].
G i v e n t h e d i s k ’s
luminosity of about LB ∼ 1.8 × 1010 L⊙ (from Table 24.1) and the bulge luminosity
of LB ∼ 0.3 × 1010 L⊙ of that, show that the mass-to-light ratio of the Milky Way
has M/LB ~15. Recent observations suggest that the mass-to-light ra...
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This document was uploaded on 03/04/2014 for the course ASTROPHYS 362 at Minnesota State University Moorhead .
- Spring '14