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Binarity in Massive Young Stellar Objects

Published online by Cambridge University Press:  29 August 2024

Robert G. Shenton Open the ORCID record for Robert G. Shenton [Opens in a new window] ,
René D. Oudmaijer Open the ORCID record for René D. Oudmaijer [Opens in a new window]  and
Stuart L. Lumsden
Robert G. Shenton*
Affiliation:
School of Physics & Astronomy, University of Leeds, Woodhouse Lane, LS2 9JT Leeds, UK
René D. Oudmaijer
Affiliation:
School of Physics & Astronomy, University of Leeds, Woodhouse Lane, LS2 9JT Leeds, UK
Stuart L. Lumsden
Affiliation:
School of Physics & Astronomy, University of Leeds, Woodhouse Lane, LS2 9JT Leeds, UK
*
email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

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Most massive stars (up to 100%) are thought to be in binary systems. The multiplicity of massive stars seems to be intrinsically linked to their formation and evolution, and so Massive Young Stellar Objects are key in observing this early stage of star formation. We have surveyed hundreds of MYSOs across the Galaxy from the RMS catalogue, using UKIDSS and VVV point source data. Preliminary results show binary fractions of 44±3% for the UKIDSS sample and 32±3% for the VVV sample. In addition we use the K-band magnitudes as a proxy for the companion mass, and find a significant fraction of the detected companions have estimated mass ratios greater than 0.5, which suggests a deviation from the capture formation scenario.

Keywords

binaries: generalstars: formationstars: massivestars: pre-main-sequence
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 556 - 558
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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), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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