000007453 001__ 7453
000007453 005__ 20250128080723.0
000007453 0247_ $$2DOI$$a10.1126/science.adg7700
000007453 037__ $$aSCART-2025-0084
000007453 100__ $$aFrost, A. J.  
000007453 245__ $$aA magnetic massive star has experienced a stellar merger
000007453 260__ $$c2024
000007453 520__ $$aMassive stars (those ≥8 solar masses at formation) have radiative envelopes that cannot sustain a dynamo, the mechanism that produces magnetic fields in lower-mass stars. Despite this, approximately 7% of massive stars have observed magnetic fields, the origin of which is debated. We used multi-epoch interferometric and spectroscopic observations to characterize HD 148937, a binary system of two massive stars. We found that only one star is magnetic and that it appears younger than its companion. The system properties and a surrounding bipolar nebula can be reproduced with a model in which two stars merged (in a previous triple system) to produce the magnetic massive star. Our results provide observational evidence that magnetic fields form in at least some massive stars through stellar mergers.
000007453 594__ $$aNO
000007453 700__ $$aSana, H.  
000007453 700__ $$aMahy, L.  
000007453 700__ $$aWade, G. 
000007453 700__ $$aBarron, J.  
000007453 700__ $$aLe Bouquin, J. -B.  
000007453 700__ $$aMérand, A.  
000007453 700__ $$aSchneider, F. R. N.  
000007453 700__ $$aShenar, T.  
000007453 700__ $$aBarbá, R. H. 
000007453 700__ $$aBowman, D. M.
000007453 700__ $$aFabry, M. 
000007453 700__ $$aFarhang, A.
000007453 700__ $$aMarchant, P. 
000007453 700__ $$aMorrell, N. I.  
000007453 700__ $$aSmoker, J. V.
000007453 773__ $$c214-217$$n6692$$pScience$$v384$$y2024
000007453 8560_ $$flaurent.mahy@ksb-orb.be
000007453 8564_ $$s8117195$$uhttp://publi2-as.oma.be/record/7453/files/Frost_Science_HD148937.pdf
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000007453 905__ $$apublished in
000007453 980__ $$aREFERD