Limits to cosmic background radiation fluctuations at 8.44 GHz between angular scales 10" and 200"

Details Limits to cosmic background radiation fluctuations at 8.44 GHz between angular scales 10" and 200" Limits to cosmic background radiation fluctuations at 8.44 GHz between angular scales 10" and 200"

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...404....8f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 404, no. 1, p. 8-20.

Astronomy and Astrophysics

Astronomy

55

Cosmology, Galactic Evolution, Polarized Radiation, Relic Radiation, Astronomical Models, Circular Polarization, Image Analysis, Linear Polarization, Radio Sources (Astronomy), Sky Brightness, Very Large Array (Vla)

Scientific paper

We have used the VLA at 8.44 GHz to measure fluctuations in the cosmic background radiation (CBR) from two deep images, each 7 x 7 arcmin in size. No fluctuations between the angular scales 10 and 200 arcsec were detected. The most accurate limit (95 percent confidence) is DeltaT/T(CBR) less than 1.9 x 10 exp -5 for 80 arcsec resolution. Similar limits have been obtained for the circularly and linearly polarized components of the CBR fluctuations. All analysis was made on dirty images, in which the statistical properties of instrumental and sky fluctuations are well-defined.

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