Material loss in two-body collisions during planet formation

Autor(en)

J. Werner, Christoph Schäfer, Thomas Maindl, Christoph Burger, Roland Speith

Abstrakt

During the formation process of a terrestrial planet, a planetary embryo does not only accrete smaller dust particles but also suffers collisions with larger planetesimals. When simulating these collisions, most N-body codes treat them as perfect merging events, i.e. the resulting body's mass is the sum of the previous ones. In our work, we aim to determine whether this assumption is a justified simplification, specifically focusing on bodies containing volatile elements, such as water.
To analyze this, we have developed a new Smooth Particle Hydrodynamics (SPH) code that includes elasto-plastic dynamics, a damage model for brittle materials and self gravity. It makes use of the Compute Unified Device Architecture (CUDA) and runs on modern GPU architectures which allows for higher resolution in less calculation time.

This enables us to take a precise look at two-body collisions and determine the amount of both transferred and ejected mass according to specific parameters such as mass ratio of impactor and target, porosity, impact velocity, impact angle and water distribution.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Eberhard Karls Universität Tübingen

Seiten

72

Anzahl der Seiten

1

Publikationsdatum

02-2016

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/material-loss-in-twobody-collisions-during-planet-formation(8e10c376-eaca-4824-94a5-7c75203471c1).html