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| Paper: |
Sparse Aperture Masking of Massive Stars |
| Volume: |
465, Four Decades of Massive Star Research - A Scientific Meeting in Honor of Anthony J. Moffat |
| Page: |
363 |
| Authors: |
Sana, H.; Lacour, S.; Le Bouquin, J.; de Koter, A.; Moni-Bidin, C.; Muijres, L.; Schnurr, O.; Zinnecker, H. |
| Abstract: |
We present the earliest results of our NACO/VLT sparse aperture masking campaign on a sample of 60 O-type stars.
We detect Δ Ks < 5 mag companions for 20–25% of our targets with separations in the range
30–100 mas (typically, 40–200 A.U.).
Most of these companions were unknown, shedding thus new light on the multiplicity properties of the massive
stars in a separation and brightness regime that has been difficult to explore so far. Adding detections
from other techniques (spectroscopy, interferometry, speckle, lucky imaging, AO), the fraction of O stars with at
least one companion is 85% (51/60 targets). This is the largest multiplicity fraction ever found. |
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