Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998exdu.work..293w&link_type=abstract
Exozodiacal Dust Workshop, p. 293
Astronomy and Astrophysics
Astronomy
Zodiacal Dust, Astronomical Models, Solar System, Poynting-Robertson Effect, Cosmic Background Explorer Satellite, Infrared Astronomy Satellite, Radiation Pressure, Perturbation, Solar Wind, Pressure Drag
Scientific paper
The inadequacy of empirical models of the zodi led the solar system dynamics group at the University of Florida to develop a model of the cloud which accounts for the dominant physical processes acting on the constituent dust particles. In the modeling, the complete dynamical evolution of the particles is followed from source to sink, including the effects of gravitational perturbations of seven planets, radiation pressure, Poynting-Robertson drag and solar wind drag. This process is carried out independently for particles originating from different sources and an understanding of the principle dynamics relevant in each case allows us to obtain the three-dimensional distribution of the surface area of dust in the cloud. These models have been tested by comparing the integrated flux from dust in the model with actual observations. Comparison with IRAS and COBE observations has proven the method to be extremely effective and has shown it to be fundamental in both understanding the observed structure, and in placing constraints on the origin of the zodi. This technique can easily be expanded to model hypothetical exozodis with hypothetical sources, physical conditions and dust properties.
Dermott Stanley F.
Grogan Keith
Jayaraman Sumita
Wyatt Mark C.
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