A magnetic massive star has experienced a stellar merger
Massive stars (those ≥8 solar masses at formation) have radiative envelopes that cannot sustain a dynamo, the mechanism that produces magnetic fields in lower-mass stars. Despite this, approximately 7% of massive stars have observed magnetic fields, the origin of which is debated. We used multi-epoc...
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| Hauptverfasser: | , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
April 12, 2024
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| In: |
Science
Year: 2024, Jahrgang: 384, Heft: 6692, Pages: 214-217 |
| ISSN: | 1095-9203 |
| DOI: | 10.1126/science.adg7700 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1126/science.adg7700 Verlag, lizenzpflichtig, Volltext: https://www.science.org/doi/10.1126/science.adg7700 
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| Verfasserangaben: | A.J. Frost, H. Sana, L. Mahy, G. Wade, J. Barron, J.-B. Le Bouquin, A. Mérand, F.R.N. Schneider, T. Shenar, R.H. Barbá, D.M. Bowman, M. Fabry, A. Farhang, P. Marchant, N.I. Morrell, J.V. Smoker |
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| 245 | 1 | 2 | |a A magnetic massive star has experienced a stellar merger |c A.J. Frost, H. Sana, L. Mahy, G. Wade, J. Barron, J.-B. Le Bouquin, A. Mérand, F.R.N. Schneider, T. Shenar, R.H. Barbá, D.M. Bowman, M. Fabry, A. Farhang, P. Marchant, N.I. Morrell, J.V. Smoker |
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| 520 | |a Massive stars (those ≥8 solar masses at formation) have radiative envelopes that cannot sustain a dynamo, the mechanism that produces magnetic fields in lower-mass stars. Despite this, approximately 7% of massive stars have observed magnetic fields, the origin of which is debated. We used multi-epoch interferometric and spectroscopic observations to characterize HD 148937, a binary system of two massive stars. We found that only one star is magnetic and that it appears younger than its companion. The system properties and a surrounding bipolar nebula can be reproduced with a model in which two stars merged (in a previous triple system) to produce the magnetic massive star. Our results provide observational evidence that magnetic fields form in at least some massive stars through stellar mergers. | ||
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| 700 | 1 | |a Barron, J. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Le Bouquin, J.-B. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Mérand, A. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Morrell, N. I. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Smoker, J. V. |e VerfasserIn |4 aut | |
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