A major asymmetric ice trap in a planet-forming disk - III. First detection of dimethyl ether Nashanty G. C. Brunken, Alice S. Booth, Margot Leemker, Pooneh Nazari, Nienke van der Marel and Ewine F. van Dishoeck A&A, 659 (2022) A29 Published online: 08 March 2022 DOI: 10.1051/0004-6361/202142981