The composition of Saturn's E ring

被引：62
作者：
Hillier, Jon K.
Green, S. F.
McBride, N.
Schwanethal, J. P.
Postberg, F.
Srama, R.
Kempf, S.
Moragas-Klostermeyer, G.
McDonnell, J. A. M.
Gruen, E.
机构：
[1] Open Univ, Planentary & Space Sci Res Inst, Milton Keynes MK7 6AA, Bucks, England
[2] Open Univ, Dept Earth Sci, Milton Keynes MK7 6AA, Bucks, England
[3] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany
[4] Univ Hawaii, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2007年 / 377卷 / 04期
关键词：
planets : rings; planets and satellites : individual : Enceladus;
D O I：
10.1111/j.1365-2966.2007.11710.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the first in situ direct measurement of the composition of particles in Saturn's rings. The Cassini cosmic dust analyser (CDA) measured the mass spectra of nearly 300 impacting dust particles during the 2004 October E ring crossing. An initial interpretation of the data shows that the particles are predominantly water ice, with minor contributions from possible combinations of silicates, carbon dioxide, ammonia, molecular nitrogen, hydrocarbons and perhaps carbon monoxide. This places constraints on both the composition of Enceladus, the main source of the E ring, as well as the grain formation mechanisms.
引用
收藏
页码：1588 / 1596
页数：9
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