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Binary Interaction Dominates the Evolution of Massive Stars

H. SanaAstronomical Institute Anton Pannekoek, Amsterdam University, Science Park 904, 1098 XH, Amsterdam, NetherlandsS. E. de MinkUniversité Bourgogne Franche-ComtéA. de KoterAstronomical Institute, Utrecht University, Princetonplein 5, 3584 CC, Utrecht, NetherlandsN. LangerArgelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, GermanyC. J. EvansUK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, UKMark GielesInstitute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UKE. GossetNational Research Fund LuxembourgR. G. IzzardArgelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, GermanyJ.-B. Le BouquinUniversité Joseph Fourier–Grenoble 1/CNRS–Institut National des Sciences de l’Univers, Institut de Planétologie et d’Astrophysique de Grenoble UMR 5274, Grenoble, FranceF. R. N. SchneiderArgelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany

2012en

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Annotatsiya

The presence of a nearby companion alters the evolution of massive stars in binary systems, leading to phenomena such as stellar mergers, x-ray binaries, and gamma-ray bursts. Unambiguous constraints on the fraction of massive stars affected by binary interaction were lacking. We simultaneously measured all relevant binary characteristics in a sample of Galactic massive O stars and quantified the frequency and nature of binary interactions. More than 70% of all massive stars will exchange mass with a companion, leading to a binary merger in one-third of the cases. These numbers greatly exceed previous estimates and imply that binary interaction dominates the evolution of massive stars, with implications for populations of massive stars and their supernovae.

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DOI: 10.1126/science.1223344

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