Bulletin de la Société Royale des Sciences de Liège

0037-9565 1783-5720

 

sinds 05 februari 2011 :
Weergave(s): 171 (5 ULiège)
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Thierry Morel

Mixing in magnetic OB stars

(Volume 80 - Année 2011)
Article
Open Access

Abstract

Recent observations have revealed the existence of a population of slowly-rotating, nitrogen-rich B dwarfs that are not predicted by evolutionary models including rotational mixing. However, as theoretical arguments suggest that magnetic processes may significantly increase the efficiency of the transport of the chemical elements, it is of importance to assess the extent of mixing in some known magnetic OB stars. We review our knowledge of the CNO abundance properties of these objects and present the first results of an NLTE abundance study of massive stars identified as being magnetic by the MiMeS collaboration. Although a nitrogen excess is often associated with the presence of a magnetic field, there is no evidence for a strict one-toone correspondence between these two phenomena. This therefore suggests that other (still elusive) parameters may control the amount of mixing experienced by main-sequence OB stars.

Om dit artikel te citeren:

Thierry Morel, «Mixing in magnetic OB stars», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 80 - Année 2011, 405 - 409 URL : http://popups.ulg.be/0037-9565/index.php?id=2886.

Over : Thierry Morel

Institute for Astrophysics and Geophysics, Liège University, Allée du 6 Août 17, 4000 Liège, Belgium