Ammonia, carbon dioxide, and the non-detection of the 2152 cm−1 CO band Jiao He, Giulia Perotti, Shahnewaz M. Emtiaz, Francis E. Toriello, Adwin Boogert, Thomas Henning and Gianfranco Vidali A&A, 668 (2022) A76 Published online: 08 December 2022 DOI: 10.1051/0004-6361/202244506