The magnetic field in the photospheric and circumstellar components of Herbig Ae stars S. Hubrig, M. A. Pogodin, R. V. Yudin, M. Schöller and R. S. Schnerr A&A, 463 3 (2007) 1039-1046 Published online: 05 December 2006 DOI: 10.1051/0004-6361:20066090