Resolved polarization changes across Hα in the classical T Tauri star RY TauriJorick S. Vink, J. E. Drew, T. J. Harries, R. D. Oudmaijer and Y. C. UnruhA&A, 406 2 (2003) 703-707DOI: https://doi.org/10.1051/0004-6361:20030833