Kruger, H. and Grun, E. and Landgraf, M. and Baguhl, M. and Dermott, S. and Fechtig, H. and Gustafson, B.A. and Hamilton, D.P. and Hanner, M.S. and Horanyi, M. and Kissel, J. and Lindblad, B.A. and Linkert, D. and Linkert, G. and Mann, I. and McDonnell, J.A.M. and Morfill, G.E. and Polanskey, C. and Schwehm, G. and Srama, R. and Zook, H.A. (1999) Three years of Ulysses dust data: 1993-1995. Planetary and Space Science, 47 (3-4). pp. 363-383. ISSN 0032-0633.
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The Ulysses spacecraft is orbiting the Sun on a highly inclined ellipse (i = 79 degrees). After its Jupiter flyby in 1992 at a heliocentric distance of 5.4 AU, the spacecraft reapproached the inner solar system, flew over the Sun's south polar region in September 1994, crossed the ecliptic plane at a distance of 1.3 AU in March 1995, and flew over the Sun's north polar resion in July 1995. We report on dust impact data obtained with the dust detector onboard Ulysses between January 1993 and December 1995. Wt publish and analyse the complete data set of 509 recorded impacts of dust particles with masses between 10-(16) g-10(-7) Together with 968 dust impacts from launch until the end of 1992 published earlier (Grun et al., 1995c), information about 1477 particles detected with the Ulysses sensor between October 1990 and December 1995 is now available. The impact rate measured between 1993 and 1995 stayed relatively constant at about 0.4 impacts per day and varied by less than a factor of ten. Most of the impacts recorded outside about 3.5 AU are compatible with particles of interstellar origin. Two populations of interplanetary particles have been recognized: big micrometer-sized particles close to the ecliptic plane and small sub-micrometer-sized particles at high ecliptic latitudes. The observed impact rate is compared with a model for the flux of interstellar dust particles which gives relatively good agreement with the observed impact rate. No change in the instrument's noise characteristics or degradation of the channeltron could be revealed during the three-year period.
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences|
|Depositing User:||I.T. Ekpo|
|Date Deposited:||20 Jun 2009 05:25|
|Last Modified:||20 Jun 2009 05:25|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/16893 (The current URI for this page, for reference purposes)|
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