Dust Impact Monitor (SESAME-DIM) on-board Rosetta/Philae: Aerogel as comet analog material
| Autor: | Cynthia A. Volkert, Thomas Albin, Walter Arnold, Klaus J. Seidensticker, Attila Hirn, Alexander Loose, Hans-Herbert Fischer, Alberto Flandes, Harald Krüger, Morris Podolak, Cornelia Mewes |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Comet Dust Impact Monitor (DIM) Comet 67P Astronomy Astronomy and Astrophysics Aerogel Dust Radius 01 natural sciences Philae SESAME Astrobiology On board Space and Planetary Science 0103 physical sciences Rosetta Low density Particle Young's moduls 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
| Popis: | On 12 November 2014, during the descent of the Rosetta lander Philae to the surface of comet 67P/Churyumov–Gerasimenko the Dust Impact Monitor (DIM) on board Philae recorded an impact of a cometary dust impact of a cometary dust particle at 2.4 km from the comet surface (5 km from the nucleus’ barycentre). In this work, we report further experiments that support the identification of this particle. We use aerogel as a comet analog material to characterise the properties of this particle. Our experiments show that this particle has a radius of 0.9 mm, a low density of 0.25 g/cm3 and a high porosity close to 90%. The particle likely moved at near 4 m/s with respect to the comet. |
| Databáze: | OpenAIRE |
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