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2011

Sparse Aperture Masking of Massive Stars

Sana, H., Lacour, S., Bouquin, J. -B. Le et al.

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We present the earliest results of our NACO/VLT sparse aperture masking (SAM) campaign to search for binarity in a sample of 60 O-type stars.

We detect Delta 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 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).

Sparse Aperture Masking of Massive Stars · Around

Built on

Mason, B. D., Gies, D. R., Hartkopf, W. I., Bagnuolo, W. G., ten Brummelaar, T., & McAlister, H. A. 1998, AJ, 115, 821
1998
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Nelan, E. P., Walborn, N. R., Wallace, D. J., Moffat, A. F. J., Makidon, R. B., Gies, D. R., & Panagia, N. 2004, AJ, 128, 323
2004
Earlier work this paper cites.
Zinnecker, H., & Yorke, H. W. 2007, ARA&A, 45, 481
2007
Earlier work this paper cites.
Sana, H., Gosset, E., Nazé, Y., Rauw, G., & Linder, N. 2008, MNRAS, 386, 447
2008
Earlier work this paper cites.

Similar

Turner, N. H., ten Brummelaar, T. A., Roberts, L. C., Mason, B. D., Hartkopf, W. I., & Gies, D. R. 2008, AJ, 136, 554
2008
Cited alongside, same era.
Mason, B. D., Hartkopf, W. I., Gies, D. R., Henry, T. J., & Helsel, J. W. 2009, AJ, 137, 3358
2009
Cited alongside, same era.
Sana, H., Gosset, E., & Evans, C. J. 2009, MNRAS, 400, 1479
2009
Cited alongside, same era.

Then

Maíz Apellániz, J. 2010, A&A, 518, A1
2010
Later among the works it cites.
Sana, H., & Evans, C. J. 2011, in Active OB stars, edited by C. Neiner, G. Wade, G. Meynet, & G. Peters, vol. 272 of IAU Symposium, 474
2011
Closest in time.
Sana, H., James, G., & Gosset, E. 2011, MNRAS, 416, 817
2011
Closest in time.

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