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The effect of the passage of Gliese 710 on Oort cloud comets

Published online by Cambridge University Press:  30 May 2022

Birgit Loibnegger Open the ORCID record for Birgit Loibnegger [Opens in a new window] ,
Elke Pilat-Lohinger Open the ORCID record for Elke Pilat-Lohinger [Opens in a new window] ,
Max Zimmermann Open the ORCID record for Max Zimmermann [Opens in a new window]  and
Sharleena Clees
Birgit Loibnegger
Affiliation:
Department of Astrophysics, University of Vienna, Türkenschanzstraße 17, 1180 Vienna, Austria email: [email protected]
Elke Pilat-Lohinger
Affiliation:
Department of Astrophysics, University of Vienna, Türkenschanzstraße 17, 1180 Vienna, Austria email: [email protected]
Max Zimmermann
Affiliation:
Department of Astrophysics, University of Vienna, Türkenschanzstraße 17, 1180 Vienna, Austria email: [email protected]
Sharleena Clees
Affiliation:
Department of Astrophysics, University of Vienna, Türkenschanzstraße 17, 1180 Vienna, Austria email: [email protected]
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Abstract

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Based on observations by Bailer-Jones et al. (2018) who propose a close fly-by of the K-type star Gliese 710 in approximately 1.36 Myr we investigate the immediate influence of the stellar passage on trajectories of Oort cloud objects. Using a newly developed GPU-based N-body code (Zimmermann (2021)) we study the motion of 3.6 million testparticles in the outer Solar system where the comets are distributed in three different “layers” around the Sun and the 4 giant planets. We study the immediate influence of Gliese 710 at three passage distances of 12000, 4300, and 1200 au. Additionally, different inclinations of the approaching star are considered. Depending on the passage distance a small number of comets (mainly from the disk and flared disk) is scattered into the observable region (< 5 au) around the Sun. In addition, a huge number of comets (mainly the ones directly in the path of the passing star) shows significant changes of their perihelia. But, they will enter the inner Solar system a long time after the stellar fly-by depending on their dynamical evolution.

Keywords

Comets: generalOort cloudSolar system: general
Type
Research Article
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S364: Multi-scale (Time and Mass) Dynamics of Space Objects (Oct 2021) , October 2019 , pp. 178 - 183
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of International Astronomical Union

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