Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsh22b..07g&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SH22B-07
Physics
6213 Dust, 7594 Instruments And Techniques, 2129 Interplanetary Dust, 2144 Interstellar Gas
Scientific paper
Galactic interstellar dust (ISD) is the major ingredient in planetary formation. However, information on this important material has been extremely limited. Recently the Ulysses dust detector has identified and measured interstellar dust outside 1.8 AU from the Sun at ecliptic latitudes above 50o. Recent Cassini measurements show that a significant ISD flux exists even inside the Earth's orbit. The Stardust mission is under way to analyze with an in-situ detector and to collect ISD between 2 and 3 AU from the Sun. Modeling the Ulysses data suggests that up to 30 % of the dust flux with masses above 10-13 g at 1 AU is of interstellar origin. It is proposed that interstellar dust flux can be identified and quantified in high-Earth orbit (outside the debris belts). A new in-situ dust telescope is used to distinguish interplanetary from interstellar dust and provide important physical, chemical and isotopic information on ISD. The dust telescope consists of three types of instruments sharing a common impact plane of 1 m2 in size and has an aperture of approximately 50o opening angle. The instruments are a high resolution impact mass spectrometer, a dust analyzer for the determination of physical and chemical dust properties, and a large-area impact detector with trajectory analysis.
Grün Eberhard
Krüger Hans
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