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Stardust Interstellar Preliminary Examination X: Impact speeds and directions of interstellar grains on the Stardust dust collector

Robert Lettieri William Marchant Larry R. Nittler Ryan Ogliore Wei Ja Ong Mark C. Price S. A. Sandford Juan-Angel Sans Tresseras Sylvia Schmitz Tom Schoonjans Geert Silversmit Alexandre Simionovici Vicente A. Sole Thomas Stephan Julien Stodolna Rhonda M. Stroud Steven Sutton Mario Trieloff Peter Tsou Akira Tsuchiyama Tolek Tyliszczak Bart Vekemans Laszlo Vincze Joshua von Korff Naomi Wordsworth Daniel Zevin Michael E. Zolensky Veerle J. Sterken Andrew J. Westphal Nicolas Altobelli Eberhard Gruen Jon K. Hillier Frank Postberg Ralf Srama Carlton Allen David Anderson Asna Ansari Sasa Bajt Ron S. Bastien Nabil Bassim Hans A. Bechtel Janet Borg Frank E. Brenker John Bridges Donald E. Brownlee Mark Burchell Manfred Burghammer Anna L. Butterworth Hitesh Changela Peter Cloetens Andrew M. Davis Ryan Doll Christine Floss George Flynn David Frank Zack Gainsforth Philipp R. Heck Peter Hoppe Bruce Hudson Joachim Huth Brit Hvide Anton Kearsley Ashley J. King Barry Lai Jan Leitner Laurence Lemelle 1 Hugues Leroux Ariel Leonard
1 LGL-TPE - Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon]
Abstract : On the basis of an interstellar dust model compatible with Ulysses and Galileo observations, we calculate and predict the trajectories of interstellar dust (ISD) in the solar system and the distribution of the impact speeds, directions, and flux of ISD particles on the Stardust Interstellar Dust Collector during the two collection periods of the mission. We find that the expected impact velocities are generally low (10 km s(-1)) for particles with the ratio of the solar radiation pressure force to the solar gravitational force beta 1, and that some of the particles will impact on the cometary side of the collector. If we assume astronomical silicates for particle material and a density of 2 g cm(-3), and use the Ulysses measurements and the ISD trajectory simulations, we conclude that the total number of (detectable) captured ISD particles may be on the order of 50. In companion papers in this volume, we report the discovery of three interstellar dust candidates in the Stardust aerogel tiles. The impact directions and speeds of these candidates are consistent with those calculated from our ISD propagation model, within the uncertainties of the model and of the observations.
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Submitted on : Wednesday, November 6, 2019 - 11:39:33 AM
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Robert Lettieri, William Marchant, Larry R. Nittler, Ryan Ogliore, Wei Ja Ong, et al.. Stardust Interstellar Preliminary Examination X: Impact speeds and directions of interstellar grains on the Stardust dust collector. Meteoritics and Planetary Science, Wiley, 2014, 49 (9, SI), pp.1680--1697. ⟨10.1111/maps.12219⟩. ⟨hal-02351050⟩

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