Magnetic field in a young circumbinary disk F. O. Alves, J. M. Girart, M. Padovani, D. Galli, G. A. P. Franco, P. Caselli, W. H. T. Vlemmings, Q. Zhang and H. Wiesemeyer A&A, 616 (2018) A56 Published online: 15 August 2018 DOI: 10.1051/0004-6361/201832935