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The origin of massive stellar systems via disk fragmentation

Published online by Cambridge University Press:  29 August 2024

G. André Oliva Open the ORCID record for G. André Oliva [Opens in a new window]  and
Rolf Kuiper Open the ORCID record for Rolf Kuiper [Opens in a new window]
G. André Oliva*
Affiliation:
Institute for Astronomy and Astrophysics, University of Tübingen, Auf der Morgenstelle 10, D-72076, Tübingen, Germany
Rolf Kuiper
Affiliation:
Faculty of Physics, University of Duisburg–Essen, Lotharstraße 1, D-47057, Duisburg, Germany
*
email: astro@gandreoliva.org
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Abstract

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In this contribution, we explore the question on the formation of multiple massive stellar systems via disk fragmentation with the help of the highest-resolution simulations to date of a fragmenting disk in the context of massive star formation. The simulations start from a collapsing cloud of 200 solar masses, followed by the formation of an accretion disk that develops spiral arms and fragments. Due to the high resolution of our grid, we are able to self-consistently form the fragments without the need for a subgrid module such as sink particles. We track the formed fragments into the first stages of companion formation, which allows us to give an estimate of the multiplicity of the final system due to disk fragmentation. We find in total around ∼6 fragments, some at orbits of ∼ 1000 au, and some close (possibly spectroscopic) companions.

Keywords

stars: massivestars: formationaccretionaccretion disksstars: binaries: closemethods: numerical
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 528 - 533
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Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work.
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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