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Homework Help: Interstellar dust

  1. Oct 23, 2007 #1
    1. The problem statement, all variables and given/known data

    Suppose that the density of interstellar dust is uniform along the direction of the plane of the galaxy, but that its vertical density is given approximately by

    [tex]\rho[/tex] = [tex]\rho[/tex] [tex]\o[/tex] exp - ( z / 0.15 )^2

    where z is the distance from the plane of our galaxy in kpc. If the net extinction perpendicular to the galactic plane is 0.4 magnitudes (i.e. integrated from the mid-plane to infinity), find the extinction to an object in the galactic center, 8 kc away (and where z=0), and the ratio of the number of photons before and after the extinction

    2. Relevant equations

    Please see attachment

    3. The attempt at a solution

    I am very confused, no clue!

    Attached Files:

  2. jcsd
  3. Oct 23, 2007 #2
    Here the (phi) symbol stands for (o)
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