Mapping deuterated methanol toward L1544 - I. Deuterium fraction and comparison with modeling A. Chacón-Tanarro, P. Caselli, L. Bizzocchi, J. E. Pineda, O. Sipilä, A. Vasyunin, S. Spezzano, A. Punanova, B. M. Giuliano and V. Lattanzi A&A, 622 (2019) A141 Published online: 11 February 2019 DOI: 10.1051/0004-6361/201832703