A high HDO/H2O ratio in the Class I protostar L1551 IRS5 A. Andreu, A. Coutens, F. Cruz-Sáenz de Miera, N. Houry, J. K. Jørgensen, A. Kóspál and D. Harsono A&A, 677 (2023) L17 Published online: 22 September 2023 DOI: 10.1051/0004-6361/202347484