Comparative Studies of Visible and IRAS Interplanetary Dust Bands

Abstract

We have examined the diversity and similarity of visible dust bands and infrared dust bands based on data obtained by our ground-based observations (Ishiguro et al. 1999, ApJ 511, 432) and by the Infrared Astronomy Satellite (IRAS). It is found that the latitude profile of visible dust bands at the solar elongation, λ - λ⊙ = 89°, is similar to that of infrared dust bands, except for the appearance of bands found at the ecliptic latitude, β = ± 5°, in only the visible region. Using the migration model for the spatial distribution of interplanetary dust bands, originally deduced from the infrared data (Reach et al. 1997, AAA 67.106.048), we predicted the visible band structure near to the anti-solar point in order to examine our observed evidence. Our results verify that the visible dust bands at β = +2° and −4° near to the anti-solar point comprise the dust particles originally supplied from the Themis and Koronis families.