Galactic dust emission and the cosmic microwave background

Details Galactic dust emission and the cosmic microwave background Galactic dust emission and the cosmic microwave background

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.252..462b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 252, Oct. 1, 1991, p. 462-472.

Astronomy and Astrophysics

Astronomy

19

Background Radiation, Cosmic Dust, Galactic Radiation, Microwave Emission, Relic Radiation, Cosmic Noise, H I Regions, Infrared Astronomy Satellite

Scientific paper

The constraints imposed on observations of the cosmic microwave background by the presence of galactic dust emission are examined. The nature of the dust emission, in terms of grain properties and environment, and the overall galactic emission (especially at high latitudes) is considered. The IRAS 100-micron survey should provide useful data on which to base estimates of emission at longer wavelengths. However, variations in the dust heating from place to place in the Galaxy, and, should they be found, variations in the dust/gas ratio and grain properties within the Galaxy imply that multiwavelength coverage and detailed point to point modeling of the galactic dust emission is required if genuine CMB anisotropies are to be observed at far-infrared frequencies. If a new dust component is found which is not correlated with the H I associated dust seen by IRAS, the 100-micron data will no longer accurately trace the dust emission at longer wavelengths. Estimates are given of the likely dust contribution to observations by COBE at 90 GHz.

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