AST 465 - Homework 2
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Thursday Oct 6 2011
Due: a week later
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1) a) Sketch the mass functions of dark matter and of galaxies
   b) Discuss the differences, and explanations for the differences

2) a) In what circumstances would you use a semi-analytical model, rather
    than a hydro model ?
   b) In what circumstances would you use a hydro model, rather than a
    semi-analytical model ?

3) Read Mo, Mao, & White 1998, MNRAS, 295, 319  and
     Guedes et al, 2011, arXiv:1103.6030
  a) summarize both papers (1 short paragraph for each with all the key
       points)
  b) discuss what the key differences are between the two papers
      (half a page max)