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Discriminating between overshooting and rotational mixing in massive stars: any help from asteroseismology?
Miglio, Andrea; Montalban Iglesias, Josefa; Eggenberger, P. et al.
2009In Communications in Asteroseismology, 158, p. 233-238
Peer reviewed
 

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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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Miglio, Andrea ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Montalban Iglesias, Josefa ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Eggenberger, P.
Noels-Grötsch, Arlette 
Language :
English
Title :
Discriminating between overshooting and rotational mixing in massive stars: any help from asteroseismology?
Publication date :
01 July 2009
Event name :
38th Liege International Astrophysical Colloquium: Evolution and Pulsation of Massive Stars on the Main Sequence and Close to it"
Event place :
Liège, Belgium
Event date :
July 7-11 2008
Audience :
International
Journal title :
Communications in Asteroseismology
ISSN :
1021-2043
eISSN :
2224-8374
Publisher :
Verlag der Österreichischen Akademie der Wissenschaften, Wien, Austria
Volume :
158
Pages :
233-238
Peer reviewed :
Peer reviewed
Available on ORBi :
since 27 November 2012

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