S
Sascha Kempf
Researcher at University of Colorado Boulder
Publications - 188
Citations - 7024
Sascha Kempf is an academic researcher from University of Colorado Boulder. The author has contributed to research in topics: Cosmic dust & Enceladus. The author has an hindex of 42, co-authored 182 publications receiving 6015 citations. Previous affiliations of Sascha Kempf include University of Jena & Max Planck Society.
Papers
More filters
Journal ArticleDOI
Sodium salts in E-ring ice grains from an ocean below the surface of Enceladus
Frank Postberg,Sascha Kempf,Jürgen Schmidt,Nikolai V. Brilliantov,A. Beinsen,Bernd Abel,Udo Buck,Ralf Srama +7 more
TL;DR: The identification of a population of E-ring grains that are rich in sodium salts, which can arise only if the plumes originate from liquid water, and the abundance of various salt components in these particles exhibit a compelling similarity to the predicted composition of a subsurface Enceladus ocean in contact with its rock core.
Journal ArticleDOI
A salt-water reservoir as the source of a compositionally stratified plume on Enceladus
TL;DR: Whereas previous Cassini observations were compatible with a variety of plume formation mechanisms, these data eliminate or severely constrain non-liquid models and strongly imply that a salt-water reservoir with a large evaporating surface provides nearly all of the matter in the plume.
Journal ArticleDOI
Ongoing hydrothermal activities within Enceladus
Hsiang-Wen Hsu,Frank Postberg,Yasuhito Sekine,Takazo Shibuya,Sascha Kempf,Mihaly Horanyi,Antal Juhász,Nicolas Altobelli,Katsuhiko Suzuki,Yuka Masaki,Tatsu Kuwatani,Shogo Tachibana,Sin Iti Sirono,Georg Moragas-Klostermeyer,Ralf Srama +14 more
TL;DR: Analysis of silicon-rich, nanometre-sized dust particles (so-called stream particles) that stand out from the water-ice-dominated objects characteristic of Saturn indicate ongoing high-temperature (>90 °C) hydrothermal reactions associated with global-scale geothermal activity that quickly transports hydroThermal products from the ocean floor at a depth of at least 40 kilometres up to the plume of Enceladus.
Journal ArticleDOI
Cassini Dust Measurements at Enceladus and Implications for the Origin of the E Ring
Frank Spahn,Jürgen Schmidt,Nicole Albers,Marcel Hörning,Martin Makuch,Martin Seiß,Sascha Kempf,Ralf Srama,Valeri Dikarev,Valeri Dikarev,Stefan Helfert,Georg Moragas-Klostermeyer,Alexander V. Krivov,M. Sremcevic,Anthony J. Tuzzolino,Thanasis E. Economou,Eberhard Grün,Eberhard Grün +17 more
TL;DR: During Cassini's close flyby of Enceladus on 14 July 2005, the High Rate Detector of the Cosmic Dust Analyzer registered micron-sized dust particles enveloping this satellite; this asymmetric signature is consistent with a locally enhanced dust production in the south polar region of Encesladus.
Journal ArticleDOI
The Cassini Cosmic Dust Analyzer
Ralf Srama,Thomas J. Ahrens,Nicolas Altobelli,S. Auer,J. G. Bradley,M. E. Burton,Valeri Dikarev,Valeri Dikarev,Thanasis E. Economou,Hugo Fechtig,M. Görlich,Manuel Grande,Amara L. Graps,Eberhard Grün,Eberhard Grün,Ove Havnes,S. Helfert,Mihaly Horanyi,Eduard Igenbergs,Elmar K. Jessberger,Torrence V. Johnson,Sascha Kempf,Alexander V. Krivov,Harald Krüger,A. Mocker-Ahlreep,Georg Moragas-Klostermeyer,Philippe Lamy,Markus Landgraf,D. Linkert,G. Linkert,F. Lura,J. A. M. McDonnell,D. Möhlmann,Gregor E. Morfill,M. Müller,M. Roy,Gerhard Schäfer,G. Schlotzhauer,Gerhard Schwehm,Frank Spahn,M. Stübig,J. Svestka,V. Tschernjawski,Anthony J. Tuzzolino,R. Wäsch,H. A. Zook +45 more
TL;DR: The Cassini-Huygens Cosmic Dust Analyzer (CDA) is intended to provide direct observations of dust grains with masses between 10-19 and 10-9 kg in interplanetary space and in the jovian and satumian systems, to investigate their physical, chemical and dynamical properties as functions of the distances to the Sun, to Jupiter and to Saturn and its satellites and rings as mentioned in this paper.