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Characteristic angular scales in cosmic microwave background radiation

Ghasemi, F ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1088/1742-5468/2006/11/P11008
  3. Publisher: 2006
  4. Abstract:
  5. We investigate the stochasticity in temperature fluctuations in the cosmic microwave background (CMB) radiation data from the Wilkinson Microwave Anisotropy Probe. We show that the angular fluctuation of the temperature is a Markov process with a Markov angular scale, ΘMarkov = 1.01 -0.07+0.09. We characterize the complexity of the CMB fluctuations by means of a Fokker-Planck or Langevin equation and measure the associated Kramers-Moyal coefficients for the fluctuating temperature field T (n̂)and its increment, ∇ T = T(n̂2). Through this method we show that temperature fluctuations in the CMB have fat tails compared to a Gaussian distribution. © 2006 IOP Publishing Ltd and SISSA
  6. Keywords:
  7. New applications of statistical mechanics
  8. Source: Journal of Statistical Mechanics: Theory and Experiment ; Issue 11 , 2006 ; 17425468 (ISSN)
  9. URL: https://iopscience.iop.org/article/10.1088/1742-5468/2006/11/P11008