ORBi: Thoul Anne - Seismic modelling of the beta Cep star EN (16) Lacertae

Reference : Seismic modelling of the beta Cep star EN (16) Lacertae


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/78961

Title :	Seismic modelling of the beta Cep star EN (16) Lacertae
Language :	English
Author, co-author :	Thoul, Anne [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 [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique >]
	Scuflaire, Richard [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 [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 [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Publication date :	1-Jul-2003
Journal title :	Astronomy and Astrophysics
Publisher :	EDP Sciences
Volume :	406
Issue/season :	1
Pages :	287-292
Audience :	International
ISSN :	0004-6361
e-ISSN :	1432-0746
City :	Les Ulis
Country :	France
Keywords :	[en] stars: binaries: spectroscopic ; stars: variables: general ; stars: individual: EN(16) Lac
Abstract :	[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.
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Permalink :	http://hdl.handle.net/2268/78961
	also: http://hdl.handle.net/2268/76863 ; http://hdl.handle.net/2268/81309
DOI :	10.1051/0004-6361:20030757
Other URL :	http://adsabs.harvard.edu/abs/2003A%26A...406..287T

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