A search for small-scale structure in the background radiation at 6 centimeters

Details A search for small-scale structure in the background radiation at 6 centimeters A search for small-scale structure in the background radiation at 6 centimeters

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..794m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 15, 1988, p. 794-800.

Astronomy and Astrophysics

Astronomy

29

Background Radiation, Microwave Emission, Radiation Distribution, Radio Sources (Astronomy), Sky Surveys (Astronomy), Angular Distribution, Cosmic Rays, Fourier Transformation, Very Large Array (Vla)

Scientific paper

The authors present the results of a search for angular structure in 6 cm radio emission of the sky on scales less than 1arcmin. A deep VLA map of a field free of strong radio sources is found to contain structure beyond the expected contribution of faint discrete sources. This structure is unlikely to be due to purely instrumental effects, but one cannot rule out the possibility of contamination by sidelobes of the radio sources in the field. In terms of the microwave background temperature T = 2.74K, emission on scales between 18arcsec and 160arcsec has rms fluctuations ΔT/T ≈ 2×10-4, with an upper limit of 4×10-4.

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