دورية أكاديمية
Formation of fused aggregates under long-term microgravity conditions aboard the ISS with implications for early solar system particle aggregation
| العنوان: | Formation of fused aggregates under long-term microgravity conditions aboard the ISS with implications for early solar system particle aggregation |
|---|---|
| المؤلفون: | Koch, Tamara, Spahr, Dominik, Tkalcec, Beverley J., Christ, Oliver, Genzel, Philomena-Theresa, Lindner, Miles, Merges, David, Wilde, Fabian, Winkler, Björn, Brenker, Frank E. |
| سنة النشر: | 2022 |
| المجموعة: | Publication Server of Goethe University Frankfurt am Main |
| مصطلحات موضوعية: | ddc:550 |
| الوصف: | In order to gain further insights into early solar system aggregation processes, we carried out an experiment on board the International Space Station, which allowed us to study the behavior of dust particles exposed to electric arc discharges under long-term microgravity. The experiment led to the formation of robust, elongated, fluffy aggregates, which were studied by scanning electron microscopy, electron backscatter diffraction, and synchrotron micro-computed tomography. The morphologies of these aggregates strongly resemble the typical shapes of fractal fluffy-type calcium-aluminum-rich inclusions (CAIs). We conclude that a small amount of melting could have supplied the required stability for such fractal structures to have survived transportation and aggregation to and compaction within planetesimals. Other aggregates produced in our experiment have a massy morphology and contain relict grains, likely resulting from the collision of grains with different degrees of melting, also observed in some natural CAIs. Some particles are surrounded by igneous rims, which remind in thickness and crystal orientation of Wark–Lovering rims; another aggregate shows similarities to disk-shaped CAIs. These results imply that a (flash-)heating event with subsequent aggregation could have been involved in the formation of different morphological CAI characteristics. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/78000Test; urn:nbn:de:hebis:30:3-780007; https://nbn-resolving.org/urn:nbn:de:hebis:30:3-780007Test; https://doi.org/10.1111/maps.13815Test; http://publikationen.ub.uni-frankfurt.de/files/78000/Meteorit_Planetary_Scien-2022-Koch.pdfTest |
| DOI: | 10.1111/maps.13815 |
| الإتاحة: | https://doi.org/10.1111/maps.13815Test http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/78000Test https://nbn-resolving.org/urn:nbn:de:hebis:30:3-780007Test http://publikationen.ub.uni-frankfurt.de/files/78000/Meteorit_Planetary_Scien-2022-Koch.pdfTest |
| حقوق: | https://creativecommons.org/licenses/by-nc-nd/4.0/deed.deTest ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.C0431276 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1111/maps.13815 |
|---|