Long-baseline interferometric multiplicity survey of the Sco-Cen OB association
By A. Rizzuto, Michael J. Ireland, J. Robertson, Y. Kok, P. Tuthill, B. Warrington, X. Haubois, W. Tango, B. Norris, T. T. ten Brummelaar and 3 more. 2013
233 citations recorded by the source corpus.
We present the rst 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 Btype stars and have detected 24 companions at separations ranging from 7-130 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, showing that the companion frequency is F = 1:35 0:25 and the mass ratio distribution is best described by q with = 0:46, agreeing with previous Sco-Cen high mass work and diering signicantly 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% 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 of multiple systems.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/c21c3b97e0e5389ccfc0d30fdf12e8b60d328a97
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In Astronomy and Astrophysics
Citations in the corpus
- SOUTHERN MASSIVE STARS AT HIGH ANGULAR RESOLUTION: OBSERVATIONAL CAMPAIGN AND COMPANION DETECTION (2014, methodology): “Furthermore, our fraction of companion is larger than the bias-corrected value of 1.35 obtained for B-type stars in the Sco-Cen OB association (Rizzuto et al. 2013), suggesting again that the fraction of companion increases with spectral type, hence with stellar mass.”
- The Close Binary Fraction of Solar-type Stars Is Strongly Anticorrelated with Metallicity (2018, background): “The separation distribution of companions to early-B primaries peaks at apeak≈10 au (Rizzuto et al. 2013; Evans et al. 2015; Moe & Di Stefano 2017).”
- New constraints on the multiplicity of massive young stars in Upper Scorpius (2015, methodology): “A similar approach has recently been followed by Rizzuto et al. (2013) who obtained interferometric observations between 550 and 800 nm with the Sydney University Stellar Interferometer (SUSI) of all stars in Sco-Cen that were brighter than 5 mag in the visual.”
- Mind Your Ps and Qs: The Interrelation between Period (P) and Mass-ratio (Q) Distributions of Binary Stars (2016, methodology): “Rizzuto et al. (2013) report Ncomp = 18 companions with q ≥ 0.3 and projected orbital separations ρ = 1.5 - 30 AU, which correspond to orbital periods 2.3 . logP (days) .”