Constraining the Origin and Structure of the Zodiacal Dust Bands with the MSX Celestial Backgrounds Data

Details Constraining the Origin and Structure of the Zodiacal Dust Bands with the MSX Celestial Backgrounds Data Constraining the Origin and Structure of the Zodiacal Dust Bands with the MSX Celestial Backgrounds Data

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003dps....35.3831g&link_type=abstract

American Astronomical Society, DPS meeting #35, #38.31; Bulletin of the American Astronomical Society, Vol. 35, p.1488

Astronomy and Astrophysics

Astronomy

Scientific paper

In recent years much work has been done to establish the provenance of the zodiacal dust bands, near-ecliptic enhancements in the brightness of the zodiacal cloud. The bands represent the debris of collisional activity in the asteroid belt, thought to be occuring within the major asteroid families of Eos, Themis and Koronis. However, recent numerical evidence for relatively fresh collisions in the Karin cluster and the Veritas family, which are located at orbital inclinations matching the observed dust band structures, have provided an alternate theory for the origin of the bands. Here we plan to take advantage of the unique nature of the MSX Celestial Backgrounds data, which in contrast to previous IRAS and COBE measurements include observations over a wide range of solar elongation angle (25 to 180 degrees). This MSX data set therefore represents a powerful resource to reconstruct the full three-dimensional structure of the dust bands, to quantify the size-frequency distribution of the dust band structures as a function of heliocentric distance, and to provide a more concrete genetic relationship between the dust bands and putative parent bodies. Previous work has also demonstrated that the zodiacal cloud is predominantly asteroidal in origin, therefore this investigation also has direct relevance to the nature and structure of asteroidal exozodiacal clouds, which needs to be understood to help ensure the success of future extrasolar planet finding missions such as Terrestrial Planet Finder.

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