First polarimetric observations and modeling of the FeH F–X systemN. Afram, S. V. Berdyugina, D. M. Fluri, M. Semel, M. Bianda and R. RamelliA&A, 473 1 (2007) L1-L4DOI: https://doi.org/10.1051/0004-6361:20078109