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

	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/19503

Title :	Deep Mixing in Slowly-rotating B Dwarfs: the Possible Role Played by Magnetic Fields
Language :	English
Author, co-author :	Morel, Thierry [Katholieke Universiteit Leuven - KUL > > > >]
Publication date :	1-Nov-2007
Main document title :	Unsolved Problems in Stellar Physics: A Conference in Honor of Douglas Gough
Pages :	229-233
Audience :	International
Keywords :	[en] Main-sequence: early-type stars ; Magnetic and electric fields ; polarization of starlight ; Stellar structure ; interiors ; evolution ; nucleosynthesis ; ages ; Abundances ; chemical composition
Abstract :	[en] 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.
Permalink :	http://hdl.handle.net/2268/19503
DOI :	10.1063/1.2818976
Other URL :	http://adsabs.harvard.edu/abs/2007AIPC..948..229M
Commentary :	948

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