Long-baseline interferometric multiplicity survey of the Sco-Cen OB association

A. C. Rizzuto; M. J. Ireland; J. G. Robertson; Y. Kok; P. G. Tuthill; B. A. Warrington; X. Haubois; W. J. Tango; B. Norris; T. Ten Brummelaar; A. L. Kraus; A. Jacob; C. Laliberte-Houdeville

doi:10.1093/mnras/stt1690

Long-baseline interferometric multiplicity survey of the Sco-Cen OB association

A. C. Rizzuto^*, M. J. Ireland, J. G. Robertson, Y. Kok, P. G. Tuthill, B. A. Warrington, X. Haubois, W. J. Tango, B. Norris, T. Ten Brummelaar, A. L. Kraus, A. Jacob, C. Laliberte-Houdeville

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

50 Citations (Scopus)

Abstract

We present the first multiplicity-dedicated long-baseline optical interferometric survey of the Scorpius-Centaurus-Lupus-Crux association. We used the Sydney University Stellar Interferometer to undertake a survey for new companions to 58 Sco-Cen B-type stars and have detected 24 companions at separations ranging from 7 to 130 mas, 14 of which are new detections. Furthermore, we use a Bayesian analysis and all available information in the literature to determine the multiplicity distribution of the 58 stars in our sample, showingthat the companion frequency is f = 1.35 ± 0.25 and the mass ratio distribution is best described by q^γ with γ = -0.46, agreeing with previous Sco-Cen high-mass work and differing significantly from lower mass stars in Tau-Aur. Based on our analysis, we estimate that among young B-type stars in moving groups, up to 23 per cent are apparently single stars.This has strong implications for the understanding of high-mass star formation, which requires angular momentum dispersal through some mechanism such as formation ofmultiple systems.

Original language	English
Pages (from-to)	1694-1707
Number of pages	14
Journal	Monthly Notices of the Royal Astronomical Society
Volume	436
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stt1690
Publication status	Published - Dec 2013
Externally published	Yes

Access to Document

10.1093/mnras/stt1690

Cite this

Rizzuto, A. C., Ireland, M. J., Robertson, J. G., Kok, Y., Tuthill, P. G., Warrington, B. A., Haubois, X., Tango, W. J., Norris, B., Ten Brummelaar, T., Kraus, A. L., Jacob, A., & Laliberte-Houdeville, C. (2013). Long-baseline interferometric multiplicity survey of the Sco-Cen OB association. Monthly Notices of the Royal Astronomical Society, 436(2), 1694-1707. https://doi.org/10.1093/mnras/stt1690

@article{24f806969afb4f76b1a9859fb8befc90,

title = "Long-baseline interferometric multiplicity survey of the Sco-Cen OB association",

abstract = "We present the first multiplicity-dedicated long-baseline optical interferometric survey of the Scorpius-Centaurus-Lupus-Crux association. We used the Sydney University Stellar Interferometer to undertake a survey for new companions to 58 Sco-Cen B-type stars and have detected 24 companions at separations ranging from 7 to 130 mas, 14 of which are new detections. Furthermore, we use a Bayesian analysis and all available information in the literature to determine the multiplicity distribution of the 58 stars in our sample, showingthat the companion frequency is f = 1.35 ± 0.25 and the mass ratio distribution is best described by qγ with γ = -0.46, agreeing with previous Sco-Cen high-mass work and differing significantly from lower mass stars in Tau-Aur. Based on our analysis, we estimate that among young B-type stars in moving groups, up to 23 per cent are apparently single stars.This has strong implications for the understanding of high-mass star formation, which requires angular momentum dispersal through some mechanism such as formation ofmultiple systems.",

keywords = "Binaries: Close, Methods: Statistical, Open clusters and associations: Individual: SCo-Cen, Stars: Formation, Techniques: High angular resolution, Techniques: Interferometric",

author = "Rizzuto, {A. C.} and Ireland, {M. J.} and Robertson, {J. G.} and Y. Kok and Tuthill, {P. G.} and Warrington, {B. A.} and X. Haubois and Tango, {W. J.} and B. Norris and {Ten Brummelaar}, T. and Kraus, {A. L.} and A. Jacob and C. Laliberte-Houdeville",

year = "2013",

month = dec,

doi = "10.1093/mnras/stt1690",

language = "English",

volume = "436",

pages = "1694--1707",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press ",

number = "2",

}

Rizzuto, AC, Ireland, MJ, Robertson, JG, Kok, Y, Tuthill, PG, Warrington, BA, Haubois, X, Tango, WJ, Norris, B, Ten Brummelaar, T, Kraus, AL, Jacob, A & Laliberte-Houdeville, C 2013, 'Long-baseline interferometric multiplicity survey of the Sco-Cen OB association', Monthly Notices of the Royal Astronomical Society, vol. 436, no. 2, pp. 1694-1707. https://doi.org/10.1093/mnras/stt1690

TY - JOUR

T1 - Long-baseline interferometric multiplicity survey of the Sco-Cen OB association

AU - Rizzuto, A. C.

AU - Ireland, M. J.

AU - Robertson, J. G.

AU - Kok, Y.

AU - Tuthill, P. G.

AU - Warrington, B. A.

AU - Haubois, X.

AU - Tango, W. J.

AU - Norris, B.

AU - Ten Brummelaar, T.

AU - Kraus, A. L.

AU - Jacob, A.

AU - Laliberte-Houdeville, C.

PY - 2013/12

Y1 - 2013/12

N2 - We present the first multiplicity-dedicated long-baseline optical interferometric survey of the Scorpius-Centaurus-Lupus-Crux association. We used the Sydney University Stellar Interferometer to undertake a survey for new companions to 58 Sco-Cen B-type stars and have detected 24 companions at separations ranging from 7 to 130 mas, 14 of which are new detections. Furthermore, we use a Bayesian analysis and all available information in the literature to determine the multiplicity distribution of the 58 stars in our sample, showingthat the companion frequency is f = 1.35 ± 0.25 and the mass ratio distribution is best described by qγ with γ = -0.46, agreeing with previous Sco-Cen high-mass work and differing significantly from lower mass stars in Tau-Aur. Based on our analysis, we estimate that among young B-type stars in moving groups, up to 23 per cent are apparently single stars.This has strong implications for the understanding of high-mass star formation, which requires angular momentum dispersal through some mechanism such as formation ofmultiple systems.

AB - We present the first multiplicity-dedicated long-baseline optical interferometric survey of the Scorpius-Centaurus-Lupus-Crux association. We used the Sydney University Stellar Interferometer to undertake a survey for new companions to 58 Sco-Cen B-type stars and have detected 24 companions at separations ranging from 7 to 130 mas, 14 of which are new detections. Furthermore, we use a Bayesian analysis and all available information in the literature to determine the multiplicity distribution of the 58 stars in our sample, showingthat the companion frequency is f = 1.35 ± 0.25 and the mass ratio distribution is best described by qγ with γ = -0.46, agreeing with previous Sco-Cen high-mass work and differing significantly from lower mass stars in Tau-Aur. Based on our analysis, we estimate that among young B-type stars in moving groups, up to 23 per cent are apparently single stars.This has strong implications for the understanding of high-mass star formation, which requires angular momentum dispersal through some mechanism such as formation ofmultiple systems.

KW - Binaries: Close

KW - Methods: Statistical

KW - Open clusters and associations: Individual: SCo-Cen

KW - Stars: Formation

KW - Techniques: High angular resolution

KW - Techniques: Interferometric

UR - http://www.scopus.com/inward/record.url?scp=84888045630&partnerID=8YFLogxK

U2 - 10.1093/mnras/stt1690

DO - 10.1093/mnras/stt1690

M3 - Article

SN - 0035-8711

VL - 436

SP - 1694

EP - 1707

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

Long-baseline interferometric multiplicity survey of the Sco-Cen OB association

Abstract

Access to Document

Other files and links

Fingerprint

Cite this