Empirical relations between the intensities of Lyman lines of H and He+
M. Gordino, F. Auchère, J.-C. Vial, K. Bocchialini, D. M. Hassler, T. Bando, R. Ishikawa, R. Kano, K. Kobayashi, N. Narukage, J. Trujillo Bueno and A. Winebarger
A&A, 657 (2022) A86
DOI: https://doi.org/10.1051/0004-6361/202141960