Binary stars in the Orion Nebula Cluster R. Köhler, M. G. Petr-Gotzens, M. J. McCaughrean, J. Bouvier, G. Duchêne, A. Quirrenbach and H. Zinnecker A&A, 458 2 (2006) 461-476 Published online: 12 September 2006 DOI: 10.1051/0004-6361:20054561