Stellar energetic particle ionization in protoplanetary disks around T Tauri stars Ch. Rab, M. Güdel, M. Padovani, I. Kamp, W.-F. Thi, P. Woitke and G. Aresu A&A, 603 (2017) A96 Published online: 12 July 2017 DOI: 10.1051/0004-6361/201630241