ORBi: Miglio Andrea - Discriminating between overshooting and rotational mixing in massive stars: any help from asteroseismology?

Reference : Discriminating between overshooting and rotational mixing in massive stars: any help fro...


	Document type :	Scientific congresses and symposiums : Paper published in a journal
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/135102

Title :	Discriminating between overshooting and rotational mixing in massive stars: any help from asteroseismology?
Language :	English
Author, co-author :	Miglio, Andrea [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie]
	Montalban Iglesias, Josefa [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie]
	Eggenberger, P. [> > > >]
	Noels-Grötsch, Arlette [> >]
Publication date :	1-Jul-2009
Journal title :	Communications in Asteroseismology
Publisher :	Verlag der Österreichischen Akademie der Wissenschaften
Volume :	158
Pages :	233-238
Audience :	International
ISSN :	1021-2043
City :	Wien
Country :	Austria
Event name :	38th Liege International Astrophysical Colloquium: Evolution and Pulsation of Massive Stars on the Main Sequence and Close to it"
Event date :	July 7-11 2008
Event place (city) :	Liège
Event country :	Belgium
Abstract :	[en] Chemical turbulent mixing induced by rotation can affect the internal distribution of μ near the energy-generating core of main-sequence stars, having an effect on the evolutionary tracks similar to that of overshooting. However, this mixing also leads to a smoother chemical composition profile near the edge of the convective core, which is reflected in the behavior of the buoyancy frequency and, therefore, in the frequencies of gravity modes. We show that for rotational velocities typical of main-sequence B-type pulsating stars, the signature of a rotationally induced mixing significantly perturbs the spectrum of gravity modes and mixed modes, and can be distinguished from that of overshooting. The cases of high-order gravity modes in Slowly Pulsating B stars and of low-order g modes and mixed modes in β Cephei stars are discussed.
Permalink :	http://hdl.handle.net/2268/135102
Other URL :	http://adsabs.harvard.edu/abs/2009CoAst.158..233M
	http://arxiv.org/abs/0901.2045

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