dc.contributor.author
Linti, Simon
dc.contributor.author
Postberg, Frank
dc.contributor.author
Hsu, Hsiang-Wen
dc.contributor.author
Hillier, Jon K.
dc.contributor.author
Fischer, Christian
dc.contributor.author
Trieloff, Mario
dc.contributor.author
Schmidt, Jürgen
dc.contributor.author
Kempf, Sascha
dc.contributor.author
Srama, Ralf
dc.date.accessioned
2024-03-25T14:14:30Z
dc.date.available
2024-03-25T14:14:30Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/43013
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-42727
dc.description.abstract
During the Grand Finale orbits, Cassini’s Cosmic Dust Analyzer (CDA) recorded in situ mass spectra of ice and mineral nanodust grains ejected from Saturn’s main rings falling into the planet’s atmosphere. We present a compositional analysis of the mineral dust fraction employing a spectral deconvolution method to determine the elemental composition of these grains. The results indicate a relatively homogenous composition of exclusively Mg-rich silicates, with Mg, Si, and Ca close to CI chondritic abundances but a significant depletion in Fe and only traces of organic material at best. The Fe depletion becomes even more pronounced when compared to Fe-rich interplanetary dust particles encountered by CDA in the Saturnian system, which are assumed to contaminate and darken the main rings over time. We discuss potential explanations for the depletion, from which we favour compositional alteration of the infalling dust grains by impact-triggered chemistry in combination with dynamical selection effects and instrumental bias as the most plausible ones. This might cause an accumulation of Fe in the main rings over time, most likely in the form of oxides.
en
dc.format.extent
15 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
data analysis
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::551 Geologie, Hydrologie, Meteorologie
dc.title
Iron depletion in mineral dust grains from Saturn’s main rings
dc.type
Wissenschaftlicher Artikel
dc.identifier.sepid
97773
dcterms.bibliographicCitation.doi
10.1093/mnras/stae603
dcterms.bibliographicCitation.journaltitle
Monthly Notices of the Royal Astronomical Society
dcterms.bibliographicCitation.number
2
dcterms.bibliographicCitation.originalpublishername
Oxford University Press
dcterms.bibliographicCitation.originalpublisherplace
Oxford
dcterms.bibliographicCitation.pagestart
1207
dcterms.bibliographicCitation.pageend
1221
dcterms.bibliographicCitation.volume
529
dcterms.bibliographicCitation.url
http://dx.doi.org/10.1093/mnras/stae603
refubium.affiliation
Geowissenschaften
refubium.affiliation.other
Institut für Geologische Wissenschaften / Fachrichtung Planetologie und Fernerkundung
refubium.funding
Publikationsfonds FU
refubium.note.author
Die Publikation wurde aus Open Access Publikationsgeldern der Freien Universität Berlin gefördert.
de
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1365-2966