Spin-orbit alignment and magnetic activity in the young planetary system AU Mic

Martioli, E.; Hebrard, G.; Moutou, C.; Donati, J. -F.; Artigau, E.; Cale, B.; Cook, N. J.; Dalal, S.; Delfosse, X.; Forveille, T.; Gaidos, E.; Plavchan, P.; Berberian, J.; Carmona, A.; Cloutier, R.; Doyon, R.; Fouque, P.; Klein, B.; des Etangs, A. Lecavelier; Manset, N.; Morin, J.; Tanner, A.; Teske, J.; Wang, S.
2020
ASTRONOMY & ASTROPHYSICS
DOI
10.1051/0004-6361/202038695
We present high-resolution near-infrared spectropolarimetric observations using the SPIRou instrument at Canada-France-Hawaii Telescope (CFHT) during a transit of the recently detected young planet AU Mic b, with supporting spectroscopic data from iSHELL at NASA InfraRed Telescope Facility. We detect Zeeman signatures in the Stokes V profiles and measure a mean longitudinal magnetic field of