Collisional water transport in late-stage planet formation: Self-consistent modeling by a N-body - SPH hybrid code
- Author(s)
- Christoph Burger, Christoph Schäfer, Akos Bazso
- Abstract
Terrestrial planet formation is believed to proceed in several relatively distinct steps, where it is especially during the last stage that material is mixed over large distances, which sets the stage for transport of water-rich material that condensed beyond the ice-line (snow-line) towards the forming inner planets. This final phase of planet formation starts when planetary embryos have already formed, still embedded in a large number of smaller bodies, and is marked by giant collisions among similar sized proto-planets. In recent years sophisticated semi-analytical models for predicting collision outcomes have been developed and applied to simulations of late-stage accretion,but so far only for tracing refractory material, and it has been shown that these models are not well-suited for predicting the fate of minorc onstituents like water inventories. Frequently occurring hit-and-run events that constitute roughly half of all giant collisions, complicate matters additionally, where not only (global) water losses, but also transfer, e.g. from a water-rich to a dry body have to be taken into account. In order to model collisional water transfer and loss in an active planet formation environment in a self-consistent way for the first time, we developed a hybrid framework, where an underlying long-term N-body simulation is combined with 3D Smooth Particle Hydrodynamics (SPH) computations of the actual collision events. The results of these SPH simulations, including both post-collision bodies in hit-and-run, are then included in the further N-body evolution.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Eberhard Karls Universität Tübingen
- Volume
- 13
- Publication date
- 09-2019
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/954ce0e2-368e-4164-aa73-a74f311a8787