Investigating the pre-main sequence magnetic chemically peculiar system HD 72106

C. P. Folsom , G. A. Wade , D. A. Hanes , C. Catala , E. Alecian , S. Bagnulo , T. Boehm , J. -C. Bouret (1) , J. -F. Donati , J. D. Landstreet

1 LAM - Laboratoire d'Astrophysique de Marseille

The origin of the strong magnetic fields observed in chemically peculiar Ap and Bp stars stars has long been debated. The recent discovery of magnetic fields in the intermediate mass pre-main sequence Herbig Ae and Be stars links them to Ap and Bp stars, providing vital clues about Ap and Bp stars and the origin and evolution of magnetic fields in intermediate and high mass stars. A detailed study of one young magnetic B star, HD 72106A, is presented. This star appears to be in a binary system with an apparently normal Herbig Ae star. A maximum longitudinal magnetic field strength of +391 +/- 65 G is found in HD 72106A, as are strong chemical peculiarities, with photospheric abundances of some elements ranging up to 100x above solar.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

C. P. Folsom, G. A. Wade, D. A. Hanes, C. Catala, E. Alecian, et al.. Investigating the pre-main sequence magnetic chemically peculiar system HD 72106. 2006. ⟨hal-00129150⟩