Limits on arcsecond-scale fluctuations in the cosmic microwave background

Details Limits on arcsecond-scale fluctuations in the cosmic microwave background Limits on arcsecond-scale fluctuations in the cosmic microwave background

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...284..479k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 284, Sept. 15, 1984, p. 479-490. Research supported by Haverford College.

Astronomy and Astrophysics

Astronomy

22

Background Radiation, Radio Astronomy, Relic Radiation, Astronomical Maps, Calibrating, Root-Mean-Square Errors, Statistical Distributions

Scientific paper

The authors used the NRAO Very Large Array in its C configuration at a wavelength of 6 cm to set upper limits on the rms fluctuation of sky brightness on angular scales of 6arcsec - 18arcsec from sources too weak to be detected individually. At the highest resolution, they establish a limit of 8 μJy per beam area on the rms sky fluctuation. If this fluctuation level is the result of a Poisson distribution of unresolved sources, each of flux density S0 Jy, then the number density of such sources per steradian must be less than 0.08 S0-2sr-1. These limits also establish limits on the rms temperature fluctuation for simple models of fluctuations in the cosmic microwave background.

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