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Title:
Cassini Dust Measurements at Enceladus and Implications for the Origin of the E Ring
Authors:
Spahn, Frank; Schmidt, Jürgen; Albers, Nicole; Hörning, Marcel; Makuch, Martin; Seiß, Martin; Kempf, Sascha; Srama, Ralf; Dikarev, Valeri; Helfert, Stefan; Moragas-Klostermeyer, Georg; Krivov, Alexander V.; Sremčevi<A>ć</A>, Miodrag; Tuzzolino, Anthony J.; Economou, Thanasis; Grün, Eberhard
Affiliation:
AA(Institut für Physik, Universität Potsdam, Am Neuen Palais 10, Haus 19, D-14469 Potsdam, Germany.), AB(Institut für Physik, Universität Potsdam, Am Neuen Palais 10, Haus 19, D-14469 Potsdam, Germany.), AC(Institut für Physik, Universität Potsdam, Am Neuen Palais 10, Haus 19, D-14469 Potsdam, Germany.), AD(Institut für Physik, Universität Potsdam, Am Neuen Palais 10, Haus 19, D-14469 Potsdam, Germany.), AE(Institut für Physik, Universität Potsdam, Am Neuen Palais 10, Haus 19, D-14469 Potsdam, Germany.), AF(Institut für Physik, Universität Potsdam, Am Neuen Palais 10, Haus 19, D-14469 Potsdam, Germany.), AG(Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.), AH(Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.), AI(Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.; Astrophysikalisches Institut, Friedrich Schiller Universität, 07745 Jena, Germany.), AJ(Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.), AK(Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.), AL(Astrophysikalisches Institut, Friedrich Schiller Universität, 07745 Jena, Germany.), AM(Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA.), AN(Laboratory for Astrophysics and Space Research, University of Chicago, Chicago, IL 60637, USA.), AO(Laboratory for Astrophysics and Space Research, University of Chicago, Chicago, IL 60637, USA.), AP(Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.; Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, HI 96822, USA.)
Publication:
Science, Volume 311, Issue 5766, pp. 1416-1418 (2006).
Publication Date:
03/2006
Category:
PLANET SCI
Origin:
SCIENCE
DOI:
10.1126/science.1121375
Bibliographic Code:
2006Sci...311.1416S

Abstract

During Cassini's close flyby of Enceladus on 14 July 2005, the High Rate Detector of the Cosmic Dust Analyzer registered micron-sized dust particles enveloping this satellite. The dust impact rate peaked about 1 minute before the closest approach of the spacecraft to the moon. This asymmetric signature is consistent with a locally enhanced dust production in the south polar region of Enceladus. Other Cassini experiments revealed evidence for geophysical activities near Enceladus' south pole: a high surface temperature and a release of water gas. Production or release of dust particles related to these processes may provide the dominant source of Saturn's E ring.
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