The composition of Saturn's E ring

Details The composition of Saturn's E ring The composition of Saturn's E ring

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007mnras.377.1588h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 377, Issue 4, pp. 1588-1596.

Astronomy and Astrophysics

Astronomy

16

Planets: Rings, Planets And Satellites: Individual: Enceladus

Scientific paper

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.

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