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Constraining the dynamical mass of the massive binary 9 Sagittarii

Published online by Cambridge University Press:  29 August 2024

Matthias Fabry Open the ORCID record for Matthias Fabry [Opens in a new window] ,
Calum Hawcroft Open the ORCID record for Calum Hawcroft [Opens in a new window] ,
Abigail J. Frost Open the ORCID record for Abigail J. Frost [Opens in a new window] ,
Laurent Mahy Open the ORCID record for Laurent Mahy [Opens in a new window] ,
Pablo Marchant ,
Jean-Baptiste Le Bouquin  and
Hugues Sana Open the ORCID record for Hugues Sana [Opens in a new window]
Matthias Fabry*
Affiliation:
Institute of Astronomy (IvS), Celestijnenlaan 200D, 3001 Leuven, Belgium
Calum Hawcroft
Affiliation:
Institute of Astronomy (IvS), Celestijnenlaan 200D, 3001 Leuven, Belgium
Abigail J. Frost
Affiliation:
Institute of Astronomy (IvS), Celestijnenlaan 200D, 3001 Leuven, Belgium
Laurent Mahy
Affiliation:
Institute of Astronomy (IvS), Celestijnenlaan 200D, 3001 Leuven, Belgium Royal Observatory of Belgium (ROB), Avenue Circulaire 3, 1180 Brussels, Belgium
Pablo Marchant
Affiliation:
Institute of Astronomy (IvS), Celestijnenlaan 200D, 3001 Leuven, Belgium
Jean-Baptiste Le Bouquin
Affiliation:
Institute of Planetology and Astrophysics (IPAG), Grenoble University, Rue de la Piscine 414, 38400 St-Martin d’Hères, France
Hugues Sana
Affiliation:
Institute of Astronomy (IvS), Celestijnenlaan 200D, 3001 Leuven, Belgium
*
email: [email protected]
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Abstract

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Especially in the upper Hertzsprung-Russell diagram, where stellar physics is least understood, obtaining model independent masses is of great value. Spectroscopic binaries that are also resolved astrometrically are an excellent alternative to eclipsing double-lined spectroscopic binaries where dynamical masses can be measured. 9 Sgr is such a massive binary. However, its characterization is troubled by conflicting conclusions from the spectroscopic analysis on the one hand and the interferometric one on the other hand. In this work, we attempt to resolve this tension by applying a novel approach to spectral disentangling of the spectroscopic data to constrain better the mass of 9 Sgr.

Keywords

stars: early-typestars: binariesstars: fundamental parameters
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 305 - 306
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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