Stratified NH and ND emission in the prestellar core 16293E in L1689N A. Bacmann, F. Daniel, P. Caselli, C. Ceccarelli, D. Lis, C. Vastel, F. Dumouchel, F. Lique and E. Caux A&A, 587 (2016) A26 Published online: 15 February 2016 DOI: 10.1051/0004-6361/201526084