Anisotropy of the diffuse background at millimeter wavelengths

Details Anisotropy of the diffuse background at millimeter wavelengths Anisotropy of the diffuse background at millimeter wavelengths

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337l...1b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 337, Feb. 1, 1989, p. L1-L4. Research supported by NSERC and NSF.

Astronomy and Astrophysics

Astrophysics

8

Anisotropy, Astronomical Spectroscopy, Cosmology, Millimeter Waves, Relic Radiation, Cosmic Dust, Frequency Response, Galaxies, Red Shift, Spectral Bands

Scientific paper

The anisotropy of the diffuse background radiation has been measured with a 10-deg FWHM beam in a broad spectral band from 0.6 to 4.0 mm. A dipole anisotropy is detected with magnitude consistent with previous measurements; the present data may, however, be contaminated by atmospheric emission. Upper limits are set to fluctuations at higher-order multipoles. The most stringent limit is at l = 4, where a 95-percent confidence-level limit of less than 0.00025 is set. The observed level of isotropy sharply constrains the possibility of local astronomical origin for the submillimeter excess.

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