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

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

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..948..229m&link_type=abstract

UNSOLVED PROBLEMS IN STELLAR PHYSICS: A Conference in Honor of Douglas Gough. AIP Conference Proceedings, Volume 948, pp. 229-2

Physics

Main-Sequence: Early-Type Stars, Magnetic And Electric Fields, Polarization Of Starlight, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages, Abundances, Chemical Composition

Scientific paper

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 boron content and the (weak) magnetic field detected in some targets.

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