Astr 345 Assignment 9
Due by midnight Fri Nov 7, 2008 (full credit), Fri Nov 14 (half credit)
1. Hartmann chp 5, problems #3, 8, 12, 13, 14, 15, 16, 18
2. Supplemental problem: using the Stefan-Boltzmann law for blackbody radiation, show that the equilibrium
temperature of non-reflective dust particles in the solar system at a distance, d, from the Sun is given by
Tdust =Tsun Rsun
d1/2
.
3. Plot the above equation of temperature vs distance. On this graph, also plot the temperatures of the
planets from Assignment #1.
4. Hints: P5-15, express dM in terms of dR, and use the “separation of variables” integration technique
Grading:
•You can share concepts, but all work must be completely original
•Write neatly and legibly
•Line up equal signs in a straight vertical column, and never have more than one equal sign on a line
•Define all non-standard variables
•Do not skip essential lines of algebra
•Develop ideas logically from start to finish
•Include a statement at the end of each problem interpreting the result
•Label your diagrams; all plots must be computer plots
•Take pride in your work
•All assignments are out of 30 points