R
Ralf Srama
Researcher at University of Stuttgart
Publications - 269
Citations - 8158
Ralf Srama is an academic researcher from University of Stuttgart. The author has contributed to research in topics: Cosmic dust & Interplanetary dust cloud. The author has an hindex of 43, co-authored 264 publications receiving 7101 citations. Previous affiliations of Ralf Srama include Baylor University & Max Planck Society.
Papers
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Journal ArticleDOI
High-velocity streams of dust originating from Saturn
Sascha Kempf,Ralf Srama,Mihaly Horanyi,M. E. Burton,Stefan Helfert,Georg Moragas-Klostermeyer,M. Roy,Eberhard Grün +7 more
TL;DR: All bursts of dust impacts detected within 150 Saturn radii are characterized by impact directions markedly different from those measured between the bursts, and they clearly coincide with the spacecraft's traversals through streams of compressed solar wind.
South-North and radial traverses through the interplanetary dust cloud
Eberhard Gruen,P. Staubach,M. Baguhl,Douglas P. Hamilton,H. A. Zook,Stanley F. Dermott,H. Fechtig,Bo Å. S. Gustafson,Martha S. Hanner,Mihaly Horanyi,Jochen Kissel,Bertil Anders Lindblad,D. Linkert,G. Linkert,Ingrid Mann,J. A. M. McDonnell,Gregor E. Morfill,C. Polanskey,Gerhard Schwehm,Ralf Srama +19 more
TL;DR: In this paper, a new model was developed based on Divine's (1993) "Five populations of interplanetary meteoroids" model to define four populations of meteoroids on elliptical orbits plus one population on hyperbolic orbits that all can fit the micrometeoroid flux observed by Galileo and Ulysses.
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The composition of Saturn's E ring
Jon K. Hillier,Simon F. Green,Neil McBride,James Schwanethal,Frank Postberg,Ralf Srama,Sascha Kempf,Georg Moragas-Klostermeyer,J. A. M. McDonnell,Eberhard Grün +9 more
TL;DR: The first in situ direct measurement of the composition of particles in Saturn's rings is presented in this paper. But this measurement was performed by the Cassini cosmic dust analyser (CDA) which measured the mass spectra of nearly 300 impacting dust particles during the 2004 October E ring crossing.
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The electrostatic potential of E ring particles
TL;DR: In this article, the electrostatic potential of E ring particles was measured using the charge-sensitive grid system of the cosmic dust analyser (CDA) on the Cassini spacecraft, which allows an in situ determination of the charge of grains bigger than 2.
Journal ArticleDOI
Low-mass nitrogen-, oxygen-bearing, and aromatic compounds in Enceladean ice grains
Nozair Khawaja,Nozair Khawaja,Frank Postberg,Frank Postberg,Jon K. Hillier,Fabian Klenner,Fabian Klenner,Sascha Kempf,Lenz Nölle,Lenz Nölle,René Reviol,Z. Zou,Ralf Srama +12 more
TL;DR: In this article, a compositional analysis of CDA mass spectra from organic-bearing ice grains was performed on the Enceladus seafloor and the results indicated that low-mass amines, carbonyls, and aromatic compounds were the best candidates for the N- and O-bearing compounds.