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Zodiacal emission. III - Dust near the asteroid belt
Reach, William T.
AA(California, University, Berkeley; NASA, Goddard Space Flight Center, Greenbelt, MD)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 392, no. 1, June 10, 1992, p. 289-299. Research supported by NASA. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Asteroid Belts, Cosmic Dust, Infrared Astronomy Satellite, Interplanetary Medium, Meteoritic Composition, Astronomical Spectroscopy, Emission Spectra, Infrared Astronomy
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Properties of the zodiacal dust bands are derived from fits to Infrared Astronomical Satellite profiles of the ecliptic. Three observations lead to the conclusion that the dust-band material is spread over a range of heliocentric distances between the asteroid belt and the sun: parallax, color temperature, and wavelength dependence of the band latitudes. The orientations of the midplanes of the bands are found to be typical of asteroids. A model of 'migrating bands', wherein dust is produced near the asteroid belt and spirals into the sun under the influence of Poynting-Robertson drag, is used to explain the range of heliocentric distances of dust-band material.

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