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Chaplygin gas,physics,cosmology

  1. May 30, 2012 #1
    Hey guys,

    I learning about the unification of dark energy and dark matter via chaplygin gas equation. Can anyone help me understand this model? here is a research paper.


    Thank you
  2. jcsd
  3. May 31, 2012 #2
    Can you be more specific? What part don't you get?
  4. May 31, 2012 #3
    I'm having trouble in plotting the graph b/b(a_eq) vs. a (eq 36) since they've only given one boundary condition. I've taken another b.c to be b(a_eq)=1, but the correct plots are not obtained
  5. May 31, 2012 #4
    The equation is linear in b, so b/b(a_eq) should be independent of the initial condition. You are calculating something wrong.
  6. May 31, 2012 #5
    ya,but how do i solve the equation 36 without 2 boundary conditions? (since it is a second order pde)
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