期刊
PHYSICS LETTERS A
卷 319, 期 1-2, 页码 21-23出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2003.09.079
关键词
cosmic microwave background; non-Gaussian multiscaling; primordial turbulence
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). (C) 2003 Elsevier B.V. All rights reserved.
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