Paper published in a journal (Scientific congresses and symposiums)
Reaching the 1% accuracy level on stellar mass and radius determinations from asteroseismology
Van Grootel, Valérie; Charpinet, Stephane; Fontaine, Gilles et al.
2014In Proceedings of the International Astronomical Union, 301, p. 305
Peer Reviewed verified by ORBi
 

Files


Full Text
T56-Van_Grootel-v3.pdf
Publisher postprint (285.97 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Abstract :
[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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Van Grootel, Valérie  ;  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.
Language :
English
Title :
Reaching the 1% accuracy level on stellar mass and radius determinations from asteroseismology
Publication date :
2014
Event name :
IAU Symposium 301: Precision Asteroseismology
Event organizer :
J. Daszynska-Daszkiewicz
Event place :
Wroclaw, Poland
Event date :
19-23 août 2013
Audience :
International
Journal title :
Proceedings of the International Astronomical Union
ISSN :
1743-9213
eISSN :
1743-9221
Publisher :
International Astronomical Union (IAU)
Volume :
301
Pages :
305
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 06 January 2014

Statistics


Number of views
41 (0 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
0
Scopus citations®
without self-citations
0
OpenCitations
 
1

Bibliography


Similar publications



Contact ORBi