S.E. de Mink
A. de Koter
J.-B. Le Bouquin
- Multiplicity of massive O stars and evolutionary implications
- ASP Conference Series
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
Nearby companions alter the evolution of massive stars in binary systems. Using a sample of Galactic massive stars in nearby young clusters, we simultaneously measure all intrinsic binary characteristics relevant to quantify the frequency and nature of binary interactions. We find a large intrinsic binary fraction, a strong preference for short orbital periods and a flat distribution for the mass-ratios. Our results do not support the presence of a significant peak of equal-mass `twin' binaries. As a result of the measured distributions, we find that over seventy per cent of all massive stars exchange mass with a companion. Such a rate greatly exceeds previous estimates and implies that the majority of massive stars have their evolution strongly affected by interaction with a nearby companion.
- Proceedings title: 370 years of astronomy in Utrecht: proceedings of a conference held at Hotel Leeuwenhorst, Noordwijkerhout,
the Netherlands, 2-5 April 2012
Publisher: Astronomical Society of the Pacific
Place of publication: San Francisco
Editors: G. Pugliese, A. de Koter, M. Wijburg
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