Rotation and magnetic field in the Be star ω Orionis C. Neiner, A.-M. Hubert, Y. Frémat, M. Floquet, S. Jankov, O. Preuss, H. F. Henrichs and J. Zorec A&A, 409 1 (2003) 275-286 Published online: 17 November 2003 DOI: 10.1051/0004-6361:20031086