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Chemical anisotropy of the cosmic microwave background radiation
Author(s) -
Chyla W. T.
Publication year - 2020
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.202023638
Subject(s) - cosmic microwave background , anisotropy , decoupling (probability) , physics , astrophysics , cosmic ray , radiation , microwave , background radiation , optics , control engineering , quantum mechanics , engineering
It is shown how the large‐scale inhomogeneous distribution of chemical elements in the primordial medium contributes to temperature fluctuations of the cosmic microwave background radiation (CMB). The magnitude of the chemical anisotropy of the CMB, which is sensitive to the absolute and relative abundance of chemical elements at the time of decoupling, is compared with the primary Sachs‐Wolfe anisotropy of the CMB in the baryon acoustic oscillations scale, which shows that the two effects are of similar importance.