Stellar Astrophysics
ASTR 410
USC fall 2004
Assignment #3:
- Due October 8 (Friday) at 2pm.
- New problems will be posted after (approx.) each class, and
will be announced in the lecture.
Problems:
- From wk. 5:
- From wk. 6:
- Problems 2.9, 2.11, 7.4a, b,c from Carroll &
Ostlie.
- Supplemental problem #1: If the true orbit of a
binary star system has a semi-major axis of s seconds
of arc (i.e., s"), and if the distance to the
system is d parsecs, show that the total mass of the
system is given by:
(M1 + M2) = d3
s3 / P2
- Supplemental problem #2: Find the relative
position of the center of mass for the:
- Sun-Jupiter system
- Earth-Moon system
- Supplemental problem #3: Venus has a maximum
elongation of 47 degrees? What is its distance from
the Sun?
- Supplemental problem #4: Jupiter orbits the Sun with a semi-major axis of 5.2 AU. The Galileo spacecraft is currently in orbit around Jupiter, and requires around 500 Watts of power to run the instruments and on-board systems. How large a solar panel would be needed (in m2) to generate this amount of power at Jupiter, assuming all of the solar flux could be converted into electricity at perfect efficiency? If the panel acted as a blackbody and was in thermal equilibrium with the solar radiation, at what temperature would it be (in K)?
