MODELING THE SPORADIC METEOROID BACKGROUND CLOUD |
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Authors: | V Dikarev E Grün J Baggaley D Galligan M Landgraf R Jehn |
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Institution: | (1) Max-Planck-Institut für Kernphysik, Heidelberg, Germany;(2) Astronomical Institute of St. Petersburg Univ., St. Petersburg, Russia;(3) HIGP, University of Hawaii, , USA;(4) University of Canterbury at Christchurch, , New Zealand;(5) Defence Technology Agency, Devonport, Auckland, New Zealand;(6) ESA/ESOC, Darmstadt, Germany |
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Abstract: | The orbital distributions of dust particles in interplanetary space are revised in the ESA meteoroid model to incorporate
more observational data and to comply with the constraints due to the long-term particle dynamics under the planetary gravity
and Poynting–Robertson effect. Infrared observations of the zodiacal cloud by the COBE Earth-bound observatory, flux measurements
by the dust detectors on board Galileo and Ulysses spacecraft, and the crater size distributions on lunar rock samples retrieved
by the Apollo missions are fused into a single model. Within the model, the orbital distributions are expanded into a sum
of contributions due to a number of known sources, including the asteroid belt with the emphasis on the prominent families
Themis, Koronis, Eos and Veritas, as well as comets on Jupiter-encountering orbits. An attempt to incorporate the meteor orbit
database acquired by the Advanced Meteor Orbit Radar at Christchurch is also discussed.
Work was done during D. Galligan’s stay at the University of Canterbury. |
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Keywords: | Dynamics interplanetary dust interstellar dust meteoroids orbital distributions |
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