Mass-spectrometric Measurements of Dust at Comets Wild-2 and Tempel-1

Details Mass-spectrometric Measurements of Dust at Comets Wild-2 and Tempel-1 Mass-spectrometric Measurements of Dust at Comets Wild-2 and Tempel-1

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1338k&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1338

Physics

Scientific paper

Stardust and Stardust-NExT have successfully completed missions where two comets have been observed and one of them has been visited by two different spacecrafts. We discuss the observations made at the comets by the impact time of flight mass spectrometer CIDA [1]. At Wild-2, 29 spectra in positive and 2 in negative mode were observed [2]. At Tempel-1 CIDA recorded 46 spectra in negative mode on the inbound and 34 in positive mode on the outbound leg. The difference in speed for the two encounters makes the instrument observe different aspects of the physical and chemical properties of the dust grains. A taxonometry of the data is established using principal component analysis. The data from the two encounters is compared with data from the cruise phase where measurements of interplanetary dust were made.

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