Reference : Seismic modelling of the beta Cep star EN (16) Lacertae
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/78961
Seismic modelling of the beta Cep star EN (16) Lacertae
English
Thoul, Anne mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Evol. et stabilité des étoiles et des amas d'étoiles (ESEA) >]
Aerts, C. [Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200 B, 3001 Leuven, Belgium]
Dupret, Marc-Antoine mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique >]
Scuflaire, Richard mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Evol. et stabilité des étoiles et des amas d'étoiles (ESEA) >]
Korotin, S. A. [Odessa Astronomical Observatory and Isaac Newton Institute of Chile, Odessa Branch, Ukraine]
Egorova, I. A. [Odessa Astronomical Observatory and Isaac Newton Institute of Chile, Odessa Branch, Ukraine]
Andrievsky, S. M. [Odessa Astronomical Observatory and Isaac Newton Institute of Chile, Odessa Branch, Ukraine]
Lehmann, H. [Thüringer Landessternwarte, 07778 Tautenburg, Germany]
Briquet, Maryline mailto [Institut d'Astrophysique et de Géophysique de Liège, Université de Liège, allée du Six Août 17, 4000 Liège, Belgium]
De Ridder, J. [Thüringer Landessternwarte, 07778 Tautenburg, Germany]
Noels-Grötsch, Arlette mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
1-Jul-2003
Astronomy and Astrophysics
EDP Sciences
406
1
287-292
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] stars: binaries: spectroscopic ; stars: variables: general ; stars: individual: EN(16) Lac
[en] We perform seismic modelling of the massive beta Cep star EN Lacertae. The starting point of our analysis is the spectroscopic mode identification recently performed. To this, we add a new updated photometric mode identification based upon a non-adiabatic description of the eigenfunctions in the outer atmosphere. Both mode identifications agree and this allows us to fine-tune the stellar parameters of EN Lacertae with unprecedented precision. This is done by producing a huge amount of stellar models with different parameters and selecting those that fulfill the frequency values and the mode identification. Our study is the first one of its kind in which a reconcilation between observed pulsational characteristics and theoretical models can be achieved at a level that allows accurate determination of the basic stellar parameters of a massive oscillator. We derive a mass of M=9.62+/- 0.11 M[SUB]sun[/SUB] and an age of 15.7 million years if we assume that convective overshooting does not occur.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
http://hdl.handle.net/2268/78961
also: http://hdl.handle.net/2268/76863 ; http://hdl.handle.net/2268/81309
10.1051/0004-6361:20030757
http://adsabs.harvard.edu/abs/2003A%26A...406..287T

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