Composition of saturnian stream particles.
During Cassini's approach to Saturn, the Cosmic Dust Analyser (CDA) discovered streams of tiny (less than 20 nanometers) high-velocity (approximately 100 kilometers per second) dust particles escaping from the saturnian system. A fraction of these impactors originated from the outskirts of Saturn's dense A ring. The CDA time-of-flight mass spectrometer recorded 584 mass spectra from the stream particles. The particles consist predominantly of oxygen, silicon, and iron, with some evidence of water ice, ammonium, and perhaps carbon. The stream particles primarily consist of silicate materials, and this implies that the particles are impurities from the icy ring material rather than the ice particles themselves.
Kempf
Sascha
S
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany. Sascha.Kempf@mpi-hd.mpg.de
Srama
Ralf
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Postberg
Frank
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Burton
Marcia
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Green
Simon F
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Helfert
Stefan
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Hillier
Jon K
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McBride
Neil
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McDonnell
J Anthony M
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Moragas-Klostermeyer
Georg
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Roy
Mou
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Grün
Eberhard
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D002244:Carbon; D005118:Extraterrestrial Environment; D006859:Hydrogen; D007053:Ice; D007501:Iron; D013058:Mass Spectrometry; D009584:Nitrogen; D010100:Oxygen; D000644:Quaternary Ammonium Compounds; D018539:Saturn; D012825:Silicon; D018531:Spacecraft
D007053:Ice; D000644:Quaternary Ammonium Compounds; D002244:Carbon; D006859:Hydrogen; D007501:Iron; D009584:Nitrogen; D010100:Oxygen; D012825:Silicon