The VLT-FLAMES Tarantula Survey XXII. Multiplicity properties of the B-type stars

被引：135
作者：
Dunstall, P. R. [1 ]
Dufton, P. L. [1 ]
Sana, H. [2 ]
Evans, C. J. [3 ]
Howarth, I. D. [4 ]
Simon-Diaz, S. [5 ,6 ]
de Mink, S. E. [7 ]
Langer, N. [8 ]
Maiz Apellaniz, J. [9 ]
Taylor, W. D. [3 ]
机构：
[1] Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland
[2] ESA Space Telescope Sci Inst, Baltimore, MD 21218 USA
[3] Royal Observ Edinburgh, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland
[4] UCL, Dept Phys & Astron, London WC1E 6BT, England
[5] Inst Astrofis Canarias, Tenerife 38205, Spain
[6] Univ La Laguna, Dept Astrofis, Tenerife 38205, Spain
[7] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 XH Amsterdam, Netherlands
[8] Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany
[9] Ctr Astrobiol INTA CSIC, Dept Astrofis, Madrid 28691, Spain
来源：
ASTRONOMY & ASTROPHYSICS | 2015年 / 580卷
基金：
英国科学技术设施理事会; 欧盟地平线“2020”;
关键词：
stars: early-type; binaries: spectroscopic; open clusters and associations: individual: 30 Doradus; YOUNG OPEN CLUSTERS; MASSIVE STARS; MAGELLANIC-CLOUD; BINARY FRACTION; SPECTROSCOPIC SURVEY; EVOLUTION; METALLICITY; VELOCITIES; FIELD;
D O I：
10.1051/0004-6361/201526192
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate the multiplicity properties of 408 B-type stars observed in the 30 Doradus region of the Large Magellanic Cloud with multi-epoch spectroscopy from the VLT-FLAMES Tarantula Survey (VFTS). We use a cross-correlation method to estimate relative radial velocities from the helium and metal absorption lines for each of our targets. Objects with significant radial-velocity variations (and with an amplitude larger than 16 km s(-1)) are classified as spectroscopic binaries. We find an observed spectroscopic binary fraction (defined by periods of < 10(3.5) d and mass ratios > 0.1) for the B-type stars, f(B)(obs) = 0.25 +/- 0.02, which appears constant across the field of view, except for the two older clusters (Hodge 301 and SL 639). These two clusters have significantly lower binary fractions of 0.08 +/- 0.08 and 0.10 +/- 0.09, respectively. Using synthetic populations and a model of our observed epochs and their potential biases, we constrain the intrinsic multiplicity properties of the dwarf and giant (i.e. relatively unevolved) B-type stars in 30 Dor. We obtain a present-day binary fraction f(B)(true) = 0.58 +/- 0.11, with a flat period distribution. Within the uncertainties, the multiplicity properties of the B-type stars agree with those for the O stars in 30 Dor from the VFTS.
引用
收藏
页数：10
相关论文
共 38 条
[1]   A spectroscopic survey on the multiplicity of high-mass stars [J].
Chini, R. ;
Hoffmeister, V. H. ;
Nasseri, A. ;
Stahl, O. ;
Zinnecker, H. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 424 (03) :1925-1929
[2]   The VMC survey I. Strategy and first data [J].
Cioni, M. -R. L. ;
Clementini, G. ;
Girardi, L. ;
Guandalini, R. ;
Gullieuszik, M. ;
Miszalski, B. ;
Moretti, M. -I. ;
Ripepi, V. ;
Rubele, S. ;
Bagheri, G. ;
Bekki, K. ;
Cross, N. ;
de Blok, W. J. G. ;
de Grijs, R. ;
Emerson, J. P. ;
Evans, C. J. ;
Gibson, B. ;
Gonzales-Solares, E. ;
Groenewegen, M. A. T. ;
Irwin, M. ;
Ivanov, V. D. ;
Lewis, J. ;
Marconi, M. ;
Marquette, J. -B. ;
Mastropietro, C. ;
Moore, B. ;
Napiwotzki, R. ;
Naylor, T. ;
Oliveira, J. M. ;
Read, M. ;
Sutorius, E. ;
van Loon, J. Th. ;
Wilkinson, M. I. ;
Wood, P. R. .
ASTRONOMY & ASTROPHYSICS, 2011, 527
[3]   THE INCIDENCE OF STELLAR MERGERS AND MASS GAINERS AMONG MASSIVE STARS [J].
de Mink, S. E. ;
Sana, H. ;
Langer, N. ;
Izzard, R. G. ;
Schneider, F. R. N. .
ASTROPHYSICAL JOURNAL, 2014, 782 (01)
[4]   THE ROTATION RATES OF MASSIVE STARS: THE ROLE OF BINARY INTERACTION THROUGH TIDES, MASS TRANSFER, AND MERGERS [J].
de Mink, S. E. ;
Langer, N. ;
Izzard, R. G. ;
Sana, H. ;
de Koter, A. .
ASTROPHYSICAL JOURNAL, 2013, 764 (02)
[5]   Fast rotating stars resulting from binary evolution will often appear to be single [J].
de Mink, Selma E. ;
Langer, Norbert ;
Izzard, Robert G. .
ACTIVE OB STARS: STRUCTURE, EVOLUTION, MASS-LOSS, AND CRITICAL LIMITS, 2011, (272) :531-532
[6]   The VLT-FLAMES Tarantula Survey X. Evidence for a bimodal distribution of rotational velocities for the single early B-type stars [J].
Dufton, P. L. ;
Langer, N. ;
Dunstall, P. R. ;
Evans, C. J. ;
Brott, I. ;
de Mink, S. E. ;
Howarth, I. D. ;
Kennedy, M. ;
McEvoy, C. ;
Potter, A. T. ;
Ramirez-Agudelo, O. H. ;
Sana, H. ;
Simon-Diaz, S. ;
Taylor, W. ;
Vink, J. S. .
ASTRONOMY & ASTROPHYSICS, 2013, 550
[7]   The VLT-FLAMES Tarantula Survey V. The peculiar B[e]-like supergiant, VFTS698, in 30 Doradus [J].
Dunstall, P. R. ;
Fraser, M. ;
Clark, J. S. ;
Crowther, P. A. ;
Dufton, P. L. ;
Evans, C. J. ;
Lennon, D. J. ;
Soszynski, I. ;
Taylor, W. D. ;
Vink, J. S. .
ASTRONOMY & ASTROPHYSICS, 2012, 542
[8]   Runaway stars as progenitors of supernovae and gamma-ray bursts [J].
Eldridge, John J. ;
Langer, Norbert ;
Tout, Christopher A. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2011, 414 (04) :3501-3520
[9]   The VLT-FLAMES survey of massive stars: observations centered on the Magellanic Cloud clusters NGC 330, NGC 346, NGC 2004, and the N11 region [J].
Evans, C. J. ;
Lennon, D. J. ;
Smartt, S. J. ;
Trundle, C. .
ASTRONOMY & ASTROPHYSICS, 2006, 456 (02) :623-U123
[10]   The VLT-FLAMES Tarantula Survey XVIII. Classifications and radial velocities of the B-type stars [J].
Evans, C. J. ;
Kennedy, M. B. ;
Dufton, P. L. ;
Howarth, I. D. ;
Walborn, N. R. ;
Markova, N. ;
Clark, J. S. ;
de Mink, S. E. ;
de Koter, A. ;
Dunstall, P. R. ;
Henault-Brunet, V. ;
Apellaniz, J. Maiz ;
McEvoy, C. M. ;
Sana, H. ;
Simon-Diaz, S. ;
Taylor, W. D. ;
Vink, J. S. .
ASTRONOMY & ASTROPHYSICS, 2015, 574
1234