The co-existence of hot and cold gas in debris discs I. Rebollido, C. Eiroa, B. Montesinos, J. Maldonado, E. Villaver, O. Absil, A. Bayo, H. Canovas, A. Carmona, Ch. Chen et al. (12 more) A&A, 614 (2018) A3 Published online: 06 June 2018 DOI: 10.1051/0004-6361/201732329