Article (Scientific journals)
Theoretical seismic properties of pre-main sequence γ Doradus pulsators
Bouabid, M*-P; Montalban Iglesias, Josefa; Miglio, Andrea et al.
2011In Astronomy and Astrophysics, 531, p. 145
Peer Reviewed verified by ORBi
 

Files


Full Text
bouabid-aa16440-11.pdf
Publisher postprint (862.76 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
asteroseismology; stars: oscillations; stars: variables: general; stars: pre-main sequence
Abstract :
[en] Context. The late A and F-type γ Doradus (γ Dor) stars pulsate with high-order gravity modes (g-modes). The existence of different evolutionary phases crossing the γ Dor instability strip raises the question whether pre-main sequence (PMS) γ Dor stars exist. <BR /> Aims: We intend to study the differences between the asteroseismic behaviour of PMS and main sequence (MS) γ Dor pulsators as predicted by the current theory of stellar evolution and stability. <BR /> Methods: We explore the adiabatic and non-adiabatic properties of high-order g-modes in a grid of PMS and MS models covering the mass range 1.2 M[SUB]&sun;[/SUB] < M[SUB]∗[/SUB] < 2.5 M[SUB]&sun;[/SUB]. <BR /> Results: We have derived the theoretical instability strip (IS) for the PMS γ Dor pulsators. This IS covers the same effective temperature range as the MS γ Dor one. Nevertheless, the frequency domain of unstable modes in PMS models with a fully radiative core is greater than in MS models, even if they present the same number of unstable modes. Moreover, the differences between MS and PMS internal structures are reflected in the average values of the period spacing, as well as in the dependence of the period spacing on the radial order of the modes, opening the window to determination of the evolutionary phase of γ Dor stars from their pulsation spectra.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Bouabid, M*-P;  UMR 6525 H. Fizeau, UNS, CNRS, OCA, Campus Valrose, 06108, Nice Cedex 2, France ; Institut d'Astrophysique et de Géophysique de l'Université de Liège, Allée du 6 Août 17, 4000, Liège, Belgium
Montalban Iglesias, Josefa ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Miglio, Andrea ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Dupret, Marc-Antoine ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Grigahcène, A.;  Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
Noels-Grötsch, Arlette ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Language :
English
Title :
Theoretical seismic properties of pre-main sequence γ Doradus pulsators
Publication date :
01 July 2011
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
531
Pages :
145
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
http://de.arxiv.org/abs/1103.4389
Available on ORBi :
since 10 January 2012

Statistics


Number of views
70 (6 by ULiège)
Number of downloads
128 (0 by ULiège)

Scopus citations®
 
14
Scopus citations®
without self-citations
11
OpenCitations
 
20

Bibliography


Similar publications



Contact ORBi