Planetesimal and planetary embryos interactions in inclined binary star systems:

Autor(en)

Maximilian Zimmermann, Elke Pilat-Lohinger

Abstrakt

In our study, we investigate the dynamical evolution of a planetesimal and planetary embryo disc within an inclined S-type binary star configuration using n-body simulations. We assume that the gas has already dissipated, thus only gravitational interactions are considered. A disk of up to 2000 Ceres to Moon sized planetesimals and few tens Moon to Mars sized planetary embryos is distributed between 1 and 4 au around the primary star. Earlier calculations indicate that over time, the objects within the disk spread across a range of 0° to 2 ib, where ib represents the inclination of the secondary star relative to the primary-disk orbital planet. Therefore, in this investigation, we utilize the orbital parameters of a previously evolved embryo/planetesimal disk and study the full gravitational interactions of the disk evolution for different binary star configurations. For S-type binary star configurations, we vary the semi-major axis (30, 60, and 100 AU), eccentricity (0.0, 0.2, and 0.4), and inclination (20°, 45°, and 60°) for two Solar-type stars. To compute all gravitational interactions, we use our recently developed GPU N-body code GANBISS, which is a highly parallelized implementation of the Bulirsch-Stoer method on a GPU an can handle several thousand interacting objects in an S-type binary star configuration. We focus on impact parameters of the disk objects, which are crucial for terrestrial planet formation and compare the results in the inclined configurations with the results in the planar configurations.

Organisation(en)

Institut für Astrophysik

Publikationsdatum

07-2024

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/2b16dd07-87bb-432a-ad76-a74a143e2440