Fragmentation of colliding planetesimals with water content
- Author(s)
- Thomas Maindl, Rudolf Dvorak, Christoph Schäfer, Roland Speith
- Abstract
We investigate the outcome of collisions of Ceres-sized planetesimals composed of a rocky core and a shell of water ice. These collisions are not only relevant for explaining the formation of planetary embryos in early planetary systems, but also provide insight into the formation of asteroid families and possible water transport via colliding small bodies. Earlier studies show characteristic collision velocities exceeding the bodies' mutual escape velocity which - along with the distribution of the impact angles - cover the collision outcome regimes 'partial accretion', 'erosion', and 'hit-and-run' leading to different expected fragmentation scenarios. Existing collision simulations use bodies composed of strengthless material; we study the distribution of fragments and their water contents considering the full elasto-plastic continuum mechanics equations also including brittle failure and fragmentation.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Eberhard Karls Universität Tübingen
- Journal
- Proceedings of the International Astronomical Union
- Volume
- 9
- Pages
- 138-141
- No. of pages
- 4
- ISSN
- 1743-9213
- DOI
- https://doi.org/10.1017/S1743921314008059
- Publication date
- 07-2014
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Public Health, Environmental and Occupational Health, Astronomy and Astrophysics, Nutrition and Dietetics, Medicine (miscellaneous), Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/6ab56d94-1d4f-4e06-9fbb-ecc1c76eeda8