F
Frank Postberg
Researcher at Free University of Berlin
Publications - 158
Citations - 4590
Frank Postberg is an academic researcher from Free University of Berlin. The author has contributed to research in topics: Cosmic dust & Enceladus. The author has an hindex of 29, co-authored 133 publications receiving 3606 citations. Previous affiliations of Frank Postberg include Max Planck Society & Heidelberg University.
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
Macromolecular organic compounds from the depths of Enceladus
Frank Postberg,Frank Postberg,Nozair Khawaja,Bernd Abel,Gaël Choblet,Christopher R. Glein,Murthy S. Gudipati,Bryana L. Henderson,Hsiang-Wen Hsu,Sascha Kempf,Fabian Klenner,Georg Moragas-Klostermeyer,Brian Magee,Brian Magee,Lenz Nölle,Mark E. Perry,René Reviol,Jürgen Schmidt,Ralf Srama,Ferdinand Stolz,Ferdinand Stolz,Gabriel Tobie,Mario Trieloff,J. Hunter Waite +23 more
TL;DR: The detection of complex organic molecules with masses higher than 200 atomic mass units in ice grains emitted from Enceladus indicates the presence of a thin organic-rich layer on top of the moon’s subsurface ocean.
Journal ArticleDOI
Evidence for interstellar origin of seven dust particles collected by the Stardust spacecraft
Andrew J. Westphal,Rhonda M. Stroud,Hans A. Bechtel,Frank E. Brenker,Anna L. Butterworth,George J. Flynn,D. Frank,Zack Gainsforth,Jon K. Hillier,Frank Postberg,Alexandre Simionovici,Veerle Sterken,Larry R. Nittler,Carlton Allen,Dustin Anderson,Asna Ansari,Saša Bajt,Ron K. Bastien,Nabil Bassim,John Bridges,Donald E. Brownlee,Mark J. Burchell,Manfred Burghammer,Hitesh Changela,Peter Cloetens,Andrew M. Davis,Ryan Doll,Christine Floss,Eberhard Grün,Philipp R. Heck,Peter Hoppe,Bruce Hudson,Joachim Huth,Anton T. Kearsley,Ashley J. King,Barry Lai,Jan Leitner,Laurence Lemelle,Ariel Leonard,Hugues Leroux,R. Lettieri,William Marchant,Ryan C. Ogliore,Wei Jia Ong,Mark C. Price,Scott A. Sandford,Juan-Angel Sans Tresseras,Sylvia Schmitz,Tom Schoonjans,Kate Schreiber,Geert Silversmit,Vicente A. Solé,Ralf Srama,Frank J. Stadermann,Thomas Stephan,Julien Stodolna,Stephen R. Sutton,Mario Trieloff,Peter Tsou,Tolek Tyliszczak,Bart Vekemans,Laszlo Vincze,Joshua Von Korff,Naomi Wordsworth,Daniel Zevin,Michael E. Zolensky +65 more
TL;DR: The Stardust Interstellar Dust Collector captured seven particles and returned to Earth for laboratory analysis have features consistent with an origin in the contemporary interstellar dust stream and more than 50 spacecraft debris particles were also identified as discussed by the authors.