Deep Mixing in Slowly-rotating B Dwarfs: the Possible Role Played by Magnetic Fields

Thierry Morel, Richard J. Stancliffe, Guenter Houdek, Rebecca G. Martin, Christopher A. Tout
2007 AIP Conference Proceedings  
Evolutionary models for massive stars which take into account rotational mixing effects do not predict any core-processed material at the surface of B dwarfs with low rotational velocities. We present a detailed and fully homogeneous non-LTE abundance analysis of a sample of largely unevolved B stars which points to the existence of a population of intrinsically slowly-rotating, yet nitrogen-rich objects contrary to theoretical expectations. These observations are discussed in relation to the
more » ... n relation to the boron content and the (weak) magnetic field detected in some targets.
doi:10.1063/1.2818976 fatcat:atdigk7h5rbvbouuncgx4isj5u