Constraining the Flux of Exogenous Dust Delivery onto Saturn Rings with CASSINI-CDA

Details Constraining the Flux of Exogenous Dust Delivery onto Saturn Rings with CASSINI-CDA Constraining the Flux of Exogenous Dust Delivery onto Saturn Rings with CASSINI-CDA

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.2210a&link_type=abstract

American Astronomical Society, DPS meeting #42, #22.10; Bulletin of the American Astronomical Society, Vol. 42, p.990

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a progress report on the analysis of the CASSINI-CDA (Cosmic Dust Analyzer) data set to constrain the in-fall of exogenous dust into the Saturn's system. Measuring the flux of particles not gravitationally bound to Saturn provides a crucial constraint on ring evolution scenarii.
The constant rain of dust particles, probably rich in carbonaceous material, should darken the bright surface of icy ring particles and the darkening rate can be envisioned as a clock ticking since the ring formation.
Dust particles not gravitationally bound to Saturn fall into two categories: particles of interplanetary (IDPs) or interstellar (ISDs) origin. The later can in principle be well characterized by their impact direction, flux and size distribution. In contrast, the IDP population at Saturn orbit is still poorly characterized due to the lack of observational data. Contributions from short period Jupiter family comet are expected as well as particles generated by collisions in the Kuiper Belt and spiraling inwards the Solar system under Poynting-Robertson drag.

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