NH3 (1,1) hyperfine intensity anomalies in the Orion A molecular cloud Dong-dong Zhou, Gang Wu, Jarken Esimbek, Christian Henkel, Jian-jun Zhou, Da-lei Li, Wei-guang Ji and Xing-wu Zheng A&A, 640 (2020) A114 Published online: 25 August 2020 DOI: 10.1051/0004-6361/201936661