Gaussian nature of the COBE data from multipoint correlations

Samuel I. Vainshtein, Andrea Malagoli, Katepalli R. Sreenivasan

Research output: Contribution to journalArticlepeer-review


Important information about the early universe can be obtained from a study of the cosmic background radiation (CBR) in the microwave range. We study high-order correlation and structure functions of temperature fluctuations collected from the first two years of Differential Microwave Radiometer (DMR) observations from the Cosmic Background Explorer (COBE) satellite. The intent is to determine whether the radiation data possess significant deviations from Gaussianity. The most difficult problem in drawing meaningful conclusions is the presence of instrumental noise, which is quite strong even after a two-year averaging has been performed. We have taken into account the noise in various ways. Within the limitations imposed by the noise, our study shows that the fluctuations are quite likely to be Gaussian-like. The results can, therefore, be said to favor the inflation scenario of the universe.

Original languageEnglish (US)
Pages (from-to)6796-6804
Number of pages9
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number12
StatePublished - 1996

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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