Accreting protoplanets: spectral signatures and magnitude of gas and dust extinction at H α - Marleau, Gabriel-Dominique; Aoyama, Yuhiko; Kuiper, Rolf; Follette, K.; Turner, N. J.; Cugni, G.; Manara, C. F.; Haffert, S. Y.; Kitzmann, Daniel; Ringqvist, S. C.; Wagner, K. R.; Boekel, R. van; et al. (Astronomy and astrophysics, 2022)