Cassini/Cosmic Dust Analyzer in situ dust measurements between Jupiter and Saturn

被引:26
作者
Altobelli, N.
Dikarev, V.
Kempf, S.
Srama, R.
Helfert, S.
Moragas-Klostermeyer, G.
Roy, M.
Gruen, E.
机构
[1] NASA, JPL, Pasadena, CA 91109 USA
[2] Univ Jena, Inst Astrophys, D-6900 Jena, Germany
[3] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany
[4] St Petersburg State Univ, Astron Inst, St Petersburg, Russia
[5] Univ Hawaii, Hawaii Inst Geophys & Plantol, Honolulu, HI 96822 USA
关键词
D O I
10.1029/2006JA011978
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report an analysis of the Cosmic Dust Analyzer data obtained during the interplanetary cruise of the Cassini spacecraft between Jupiter and Saturn. The data cover the time period between the Jupiter flyby and the Saturn orbit insertion. Seventeen dust particles on bound and unbound ( hyperbolic) orbits were also detected, with sizes in the submicrometer to the micrometer range. Our measurements are compared with the Pioneer dust data obtained 30 years ago and model predictions. Particles on bound orbits have low eccentricities and low inclinations. Possible sources are short-period Jupiter family comets and circumsolar dust. The impactors on hyperbolic orbits were identified as being most likely interstellar dust (ISD) grains with a radius of approximate to 0.4 mu m. The corresponding flux of approximate to 2 x 10(-5) m(-2) s(-1) is in a very good agreement with the ISD flux measurements performed by the Ulysses spacecraft over the same time period.
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页数:15
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