Extended self-similarity of the small-scale cosmic microwave background anisotropy

A. Bershadskii, K. R. Sreenivasan

Research output: Contribution to journalArticlepeer-review


The extended self-similarity (ESS) of cosmic microwave background (CMB) radiation has been studied using recent data obtained by the space-craft based Wilkinson Microwave Anisotropy Probe. Using the ESS and the high angular scale resolution (arcminutes) of the data it is shown that the CMB temperature space increments exhibit considerable and systematic declination from Gaussianity for high order moments at the small angular scales. Moreover, the CMB space increment ESS exponents have remarkably close values to the ESS exponents observed in turbulence (in magnetohydrodynamic turbulence).

Original languageEnglish (US)
Pages (from-to)21-23
Number of pages3
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number1-2
StatePublished - Dec 1 2003


  • Cosmic microwave background
  • Non-Gaussian multiscaling
  • Primordial turbulence

ASJC Scopus subject areas

  • General Physics and Astronomy


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