10.1029/2003JA009874

Cassini between Venus and Earth: Detection of interstellar dust

Abstract

Altobelli N, Kempf S, Landgraf M, et al. Cassini between Venus and Earth: Detection of interstellar dust. Journal of Geophysical Research. 2003;108(A10):LIS 7-1-LIS 7-9.[1] We report the successful in situ measurement of interstellar dust particles inside the orbit of the Earth with the Cosmic Dust Analyzer (CDA) on the Cassini spacecraft. The impact ionization subsystem of the CDA is similar to the instruments on Ulysses and Galileo. As the heliocentric velocity and the direction of the interstellar dust flux are well known from Ulysses measurements, a combined analysis of the impact charge signals together with geometric and kinematic spacecraft data allowed us to separate interplanetary impacts from interstellar ones. The mean interstellar flux between 0.7 and 1.2 AU derived from our analysis is 2.5 +/- 0.5 . 10(-5) m(-2) s(-1), in a mass range of 5 . 10(-17) kg to 10(-15) kg which is in good agreement with the interstellar dust flux measured by Ulysses at 3 AU during the same time period [Landgraf et al., 2003]. The simultaneous detection of interstellar grains by Ulysses at 3 AU and approximately 1 AU by Cassini proves that big interstellar grains (radius greater than 0.4 mum), can penetrate deeply into the inner solar system

Similar works

Full text

thumbnail-image

Publications at Bielefeld University

Full text is not available
oai:pub.uni-bielefeld.de:2322777Last time updated on 9/5/2013

This paper was published in Publications at Bielefeld University.

Having an issue?

Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.