Translational anisotropy in the cosmic microwave background radiation and far-infrared emission by galactic dust clouds

Details Translational anisotropy in the cosmic microwave background radiation and far-infrared emission by galactic dust clouds Translational anisotropy in the cosmic microwave background radiation and far-infrared emission by galactic dust clouds

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...212l...1f&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 212, Feb. 15, 1977, p. L1, L2.

Astronomy and Astrophysics

Astronomy

5

Background Radiation, Cosmic Dust, Emission Spectra, Far Infrared Radiation, Interstellar Matter, Microwave Emission, Absorption Spectra, Anisotropy, Black Body Radiation, Galactic Structure, Infrared Astronomy, Radio Astronomy, Temperature Distribution, Translational Motion

Scientific paper

The predicted emission spectrum of galactic dust at about 10 K is compared with the spectrum of 2.8-K universal blackbody radiation and with the spectrum of the anisotropy expected in the 2.8-K radiation due to motion of earth with respect to the coordinate system in which the radiation was last scattered. The extremely anisotropic galactic-dust emission spectrum may contribute a significant background to anisotropy measurements which scan through the galactic plane. The contamination would appear in an 8-mm scan around the celestial equator, for example, as a spurious 200 km/s velocity toward declination 0 deg, right ascension 19 hr, if predictions are correct. The predicted spectrum of dust emission in the galactic plane at longitudes not exceeding about 30 deg falls below the total 2.8-K cosmic background intensity at wavelengths of at least 1 mm.

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