Journal Article FZJ-2016-06662

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png
Modeling the total dust production of Enceladus from stochastic charge equilibrium and simulations

 ;  ;  ;  ;  ;  ;  ;

2015
Elsevier Science Kidlington [u.a.]

Planetary and space science 119, 208 - 221 () [10.1016/j.pss.2015.10.002]

This record in other databases:  

Please use a persistent id in citations: doi:

Abstract: Negatively and positively charged nano-sized ice grains were detected in the Enceladus plume by the Cassini Plasma Spectrometer (CAPS). However, no data for uncharged grains, and thus for the total amount of dust, are available. In this paper we estimate this population of uncharged grains based on a model of stochastic charging in thermodynamic equilibrium and on the assumption of quasi-neutrality in the plasma-dust system. This estimation is improved upon by combining simulations of the dust component of the plume and simulations for the plasma environment into one self-consistent model. Calibration of this model with CAPS data provides a total dust production rate of about 12 kg s−1, including larger dust grains up to a few microns in size. We find that the fraction of charged grains dominates over that of the uncharged grains. Moreover, our model reproduces densities of both negatively and positively charged nanograins measured by Cassini CAPS. In Enceladus׳ plume ion densities up to View the MathML source~104cm−3 are required by the self-consistent model, resulting in an electron depletion of about 50% in the plasma, because electrons are attached to the negatively charged nanograins. These ion densities correspond to effective ionization rates of about View the MathML source10−7s−1, which are about two orders of magnitude higher than expected.

Classification:

Research Program(s):
  1. 899 - ohne Topic (POF3-899) (POF3-899)
  2. Plasma and Dust Simulations on the Saturnian Rings (hbs06_20111101) (hbs06_20111101)

Database coverage:
Medline ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; NationallizenzNationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
Click to display QR Code for this record

The record appears in these collections:
External Publications > Vita Publications
NIC

 Record created 2016-11-23, last modified 2021-01-29



Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)