Reference : Reaching the 1% accuracy level on stellar mass and radius determinations from asteros...
Scientific congresses and symposiums : Paper published in a journal
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/160653
Reaching the 1% accuracy level on stellar mass and radius determinations from asteroseismology
English
Van Grootel, Valérie mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie >]
Charpinet, Stephane []
Fontaine, Gilles []
Brassard, Pierre []
Green, Elizabeth M. []
2014
Proceedings of the International Astronomical Union
International Astronomical Union (IAU)
301
305
Yes (verified by ORBi)
No
International
1743-9213
1743-9221
IAU Symposium 301: Precision Asteroseismology
19-23 août 2013
J. Daszynska-Daszkiewicz
Wroclaw
Poland
[en] Asteroseismic modeling of subdwarf B (sdB) stars provides measurements of their fundamental parameters with a very good precision; in particular, the masses and radii deter- mined from asteroseismology are found to typically reach a precision of 1% containing various uncertainties associated with their inner structure and the underlying microphysics (composition and transition zones profiles, nuclear reaction rates, etc.). Therefore, the question of the accuracy of the stellar parameters derived by asteroseismology is legitimate. We present here the seismic modeling of the pulsating sdB star in the eclipsing binary PG 1336-018, for which the mass and the radius are independently and precisely known from the modeling of the reflection/irradiation effect and the eclipses observed in the light curve. This allows us to quantitatively evaluate the reliability of the seismic method and test the impact of uncertainties in our stellar models on the derived parameters. We conclude that the sdB star parameters inferred from asteroseismology are precise, accurate, and robust against model uncertainties.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/160653

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