Ultra Low Velocity Ejecta Generated by Slow Impacts on Rubble Pile Asteroids
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866916521829203968 |
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| author | Joeris, Kolja Schönau, Laurent Keulen, Matthias Kollmer, Jonathan E. |
| author_facet | Joeris, Kolja Schönau, Laurent Keulen, Matthias Kollmer, Jonathan E. |
| contents | We examine ejecta generated by ultra low velocity impacts under asteroid conditions. In an environment of precisely controlled milligravity and under vacuum, impacts with velocities in the range of centimeters/second are performed with irregularly shaped impactors onto granular beds. The resulting ejecta velocities are compared to existing literature values and extend the observed systematic trends towards lower impact energies, broadening the parameter range. Simulations are performed to reason the systematics and the absence thereof for measurements performed at earth gravity. We find, that the cutoff induced by gravity dependent minimal observable velocities plays a crucial role in the values obtained for mean ejecta velocities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_10140 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultra Low Velocity Ejecta Generated by Slow Impacts on Rubble Pile Asteroids Joeris, Kolja Schönau, Laurent Keulen, Matthias Kollmer, Jonathan E. Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Materials Science We examine ejecta generated by ultra low velocity impacts under asteroid conditions. In an environment of precisely controlled milligravity and under vacuum, impacts with velocities in the range of centimeters/second are performed with irregularly shaped impactors onto granular beds. The resulting ejecta velocities are compared to existing literature values and extend the observed systematic trends towards lower impact energies, broadening the parameter range. Simulations are performed to reason the systematics and the absence thereof for measurements performed at earth gravity. We find, that the cutoff induced by gravity dependent minimal observable velocities plays a crucial role in the values obtained for mean ejecta velocities. |
| title | Ultra Low Velocity Ejecta Generated by Slow Impacts on Rubble Pile Asteroids |
| topic | Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Materials Science |
| url | https://arxiv.org/abs/2412.10140 |