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Gaussian random fields

  1. Apr 19, 2013 #1
    Dear all,

    I don't understand why the Cosmic Microwave Background's angular distribution is considered to to a Gaussian random field initially.
    The rest of the analysis is roughly clear to me, COBE/WMAP/PLANCK measure the CMB Photons and show the temperature fluctuations w.r.t. the mean temperature. On this data a spherical analysis is applied... But where does the GRF come from? What is b.t.w. a geometrical meaning of a GRF?

    Thank you very much
  2. jcsd
  3. Apr 19, 2013 #2
  4. Apr 19, 2013 #3
    thanks, my math is sufficient enough to get the script. So still what mechanism makes the CMB a gaussian random field, or to be more precise, let's us initially approximate the description with a GRF and look for fluctuations?
  5. Apr 19, 2013 #4
    Last edited by a moderator: May 6, 2017
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