Multiplicity of massive O stars and evolutionary implications

被引：0

作者：

Sana, H. ^{[1
]}

de Mink, S. E. ^{[2
,3
]}

de Koter, A. ^{[1
,4
]}

Langer, N. ^{[5
]}

Evans, C. J. ^{[6
]}

Gieles, M. ^{[7
]}

Gosset, E. ^{[8
]}

Izzard, R. G. ^{[5
]}

Le Bouquin, J. -B. ^{[9
]}

Schneider, F. R. N. ^{[5
]}

机构：

[1] Univ Amsterdam, Astron Inst Anton Pannekoek, Amsterdam, Netherlands

[2] Space Telescope Sci Inst, Baltimore, MD 21201 USA

[3] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21201 USA

[4] Astron Inst, NL-3508 TA Utrecht, Netherlands

[5] Univ Bonn, Argelander Inst Astron, Bonn, Germany

[6] Astron Technol Ctr, Edinburg, TX USA

[7] Univ Cambridge, Astron Inst, Cambridge, England

[8] Univ Liege, Inst Astrophys, FRS FNRS, Liege, Belgium

[9] UJF Grenoble 1, CNRS INSU, Inst Planetol Astrophys, Grenoble, France

来源：

370 YEARS OF ASTRONOMY IN UTRECHT | 2013年 / 470卷

关键词：

YOUNG OPEN CLUSTERS; BINARY FRACTION; CLOSE BINARIES; OB2; ASSOCIATION; CONTACT; NEBULA;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：141 / +

页数：3

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