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

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

2003-11-19

arxiv.org/abs/astro-ph/0311444v1

Phys.Lett. A319 (2003) 21

Astronomy and Astrophysics

Astrophysics

Scientific paper

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 {\it 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).

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