Microwave anisotropy due to cosmic strings

Details Microwave anisotropy due to cosmic strings Microwave anisotropy due to cosmic strings

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.310..391k&link_type=abstract

Nature (ISSN 0028-0836), vol. 310, Aug. 2, 1984, p. 391-393.

Physics

271

Big Bang Cosmology, Galactic Evolution, Galactic Radio Waves, String Theory, Topology, Universe, Background Radiation, Microwaves, Minkowski Space, Phase Transformations

Scientific paper

It is shown that cosmic strings would generate anisotropy of the microwave background temperature with a very distinctive feature: the temperature would have steplike discontinuities on curves on the sky. The dynamics of cosmic strings is reviewed, and the distribution of strings in the Universe is briefly discussed, and the geometry of space-time near a string is described. The general properties of the microwave sky anisotropy in a minimal cosmic string model are calculated, and it is concluded that the line density parameter is less than 10 to the -5th. Commonly accepted values of this parameter, for the purpose of galaxy formation, are only an order of magnitude below this. The discussed anisotropy exists in addition to that produced by curvature fluctuations due to strings and matter at the time that the Universe becomes optically thin.

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