Resolved astrometric orbits of ten O-type binaries J.-B. Le Bouquin, H. Sana, E. Gosset, M. De Becker, G. Duvert, O. Absil, F. Anthonioz, J.-P. Berger, S. Ertel, R. Grellmann et al. (4 more) A&A, 601 (2017) A34 Published online: 25 April 2017 DOI: 10.1051/0004-6361/201629260