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Multiplicity of massive O stars and evolutionary implications

Sana, H, Mink, SED, Koter, AD, Langer, N, Evans, CJ, Gieles, M, Gosset, E, Izzard, RG, Bouquin, J-BL and Schneider, FRN (2012) Multiplicity of massive O stars and evolutionary implications

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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.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Sana, H
Mink, SED
Koter, AD
Langer, N
Evans, CJ
Gosset, E
Izzard, RG
Bouquin, J-BL
Schneider, FRN
Date : 20 November 2012
Uncontrolled Keywords : astro-ph.SR, astro-ph.SR, astro-ph.CO
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:40
Last Modified : 24 Jan 2020 22:39

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