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Small‐Scale Angular Fluctuations of Cosmic Background Radiation. Basic relations
Author(s) -
Dautcourt G.
Publication year - 1977
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.19772980304
Subject(s) - physics , observable , angular diameter , radiation , cosmic cancer database , observer (physics) , statistical fluctuations , radiant intensity , background radiation , astrophysics , cosmic ray , angular velocity , correlation function (quantum field theory) , computational physics , statistical physics , classical mechanics , optics , quantum mechanics , stars , dielectric
A statistical treatment is given of small‐scale angular fluctuations of cosmic background radiation propagating in F RIEDMANN models with Λ= o. It is assumed that the fluctuations arise from i the discrete nature of radiation sources; ii density inhomogeneities in continuously distributed radiating matter or from iii variable absorption along different light paths towards the observer.The observable angular correlation function of the intensity fluctuations is expressed in terms of statistical measures of the sources of fluctuations. The rather general formulae are reduced as far as possible without specifying the frequency region.