Coupling SPH and thermochemical models of planets: Methodology and example of a Mars-sized body

Golabek, Gregor J.; Emsenhuber, Alexandre; Jutzi, Martin; Asphaug, Erik I.; Gerya, Taras V. (2018). Coupling SPH and thermochemical models of planets: Methodology and example of a Mars-sized body. Icarus, 301, pp. 235-246. Elsevier 10.1016/j.icarus.2017.10.003

[img] Text
1710.03245.pdf - Submitted Version
Restricted to registered users only until 1 December 2019.
Available under License Creative Commons: Attribution-Noncommercial-No Derivative Works (CC-BY-NC-ND).

Download (5MB) | Request a copy
[img] Text
1-s2.0-S0019103517302385-main.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (2MB) | Request a copy

Giant impacts have been suggested to explain various characteristics of terrestrial planets and their moons. However, so far in most models only the immediate effects of the collisions have been considered, while the long-term interior evolution of the impacted planets was not studied. Here we present a new approach, combining 3-D shock physics collision calculations with 3-D thermochemical interior evolution models. We apply the combined methods to a demonstration example of a giant impact on a Mars-sized body, using typical collisional parameters from previous studies. While the material parameters (equation of state, rheology model) used in the impact simulations can have some effect on the long-term evolution, we find that the impact angle is the most crucial parameter for the resulting spatial distribution of the newly formed crust. The results indicate that a dichotomous crustal pattern can form after a head-on collision, while this is not the case when considering a more likely grazing collision. Our results underline that end-to-end 3-D calculations of the entire process are required to study in the future the effects of large-scale impacts on the evolution of planetary interiors.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences > Theoretical Astrophysics and Planetary Science (TAPS)
08 Faculty of Science > Physics Institute > NCCR PlanetS

UniBE Contributor:

Emsenhuber, Alexandre and Jutzi, Martin

Subjects:

500 Science > 520 Astronomy

ISSN:

0019-1035

Publisher:

Elsevier

Funders:

[4] Swiss National Science Foundation

Language:

English

Submitter:

Alexandre Emsenhuber

Date Deposited:

28 Mar 2018 09:53

Last Modified:

28 Mar 2018 09:53

Publisher DOI:

10.1016/j.icarus.2017.10.003

ArXiv ID:

1710.03250

BORIS DOI:

10.7892/boris.107600

URI:

https://boris.unibe.ch/id/eprint/107600

Actions (login required)

Edit item Edit item
Provide Feedback