An Interaction and Merger in a Massive Multiple System Create a Magnetic Field in a Massive Star
Institute of Astronomy, KU Leuven, 3001 Leuven, Belgium
email : abigail.frost@eso.org
Institute of Astronomy, KU Leuven, 3001 Leuven, Belgium
Department of Physics & Space Science, Royal Military College of Canada, Kingston Ontario K7K 0C6, Canada
Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg, 69120 Heidelberg, Germany
Institute of Astronomy, KU Leuven, 3001 Leuven, Belgium
Institute of Astronomy, KU Leuven, 3001 Leuven, Belgium
Institute of Astronomy, KU Leuven, 3001 Leuven, Belgium
UK Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ, UK
Résumé
Dans un système binaire où les étoiles sont liées gravitationnellement, celles-ci peuvent interagir entre elles, entraînant un transfert de masse et de moment angulaire. De telles interactions ont un impact dramatique sur la vie des étoiles impliquées. En effet, ces interactions peuvent modifier leur masse finale, leurs vitesses de rotation ainsi que les processus de mélange à l’intérieur des étoiles mêmes. Ici, nous présentant les résultats nos travaux qui apportent, selon nous, la preuve qu’une interaction dans un système triple a provoqué la coalescence de la binaire centrale, résultant en une étoile magnétique. Cela a créé le système tel qu’il est vu aujourd’hui – un système binaire massif entouré d’une nébuleuse d’éjections enrichie où une seule des étoiles massives est magnétique.
Abstract
When stars are gravitationally bound in a binary or higher order multiple system there is a chance they can interact, enabling mass and momentum transfer. Such interactions can be life-changing events for the stars involved as they can change their internal mixing, final mass and rotational speeds. In these proceedings, we describe our recent work which provides evidence that an interaction in a previous triple system caused a merger, the product of which is a magnetic star. This created the system as it is seen today – a massive binary system surrounded by an enriched ejecta nebula where only one of the massive stars is magnetic.
This work is distributed under the Creative Commons CC BY 4.0 Licence.
Paper presented at the 41st Liège International Astrophysical Colloquium on “The eventful life of massive star multiples,” University of Liège (Belgium), 15–19 July 2024.
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