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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 MinkDepartment of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USAA. de KoterAstronomical Institute Anton Pannekoek, Amsterdam University, Science Park 904, 1098 XH, Amsterdam, 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. GossetFonds de la Recherche Scientifique—FNRS, Institut d’Astrophysique, Liège University, Allée du 6 Août 17, B-4000 Liège, BelgiumR. 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

ABI

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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Identifikatorlar

DOI: 10.1126/science.1223344

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