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Method and Tools for an Objective Approach of White Dwarf Asteroseismology
Charpinet, Stéphane; Giammichele, N.; Brassard, Pierre et al.
2015In Astronomical Society of the Pacific Conference Series, 493, p. 151
 

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Abstract :
[en] Stellar oscillation modes propagate deep inside stars and carry on information potentially allowing us to reconstruct, through asteroseismology, parts of their internal structure and dynamics. We present and discuss here our strategy and tools developed to exploit objectively this potential for pulsating white dwarf stars. Our approach relies on a multimodal optimization technique aimed at identifying all potential seismic model solutions that best match the observed periods of a given star. This approach doesn't rely on model grids (hence avoiding their limitations) and makes use of static stellar structures of white dwarf stars as opposed to evolutionary models. The use of parameterized static models is a deliberate choice in this context and is aimed at approaching as closely as possible the real structure of the star as it is observed and probed by the detected oscillation modes without interferences from unavoidable model uncertainties propagated through billion years of evolution. We argue that this strategy is more likely to produce new tight constraints on the internal structure of white dwarf stars from which evolutionary models could be improved.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Charpinet, Stéphane
Giammichele, N.
Brassard, Pierre
Van Grootel, Valérie  ;  Université de Liège - ULiège
Fontaine, Gilles
Language :
English
Title :
Method and Tools for an Objective Approach of White Dwarf Asteroseismology
Publication date :
June 2015
Event name :
19th European Workshop on White Dwarfs
Event organizer :
Patrick Dufour
Event place :
Montréal, Canada
Event date :
11-15 August 2014
Audience :
International
Journal title :
Astronomical Society of the Pacific Conference Series
ISSN :
1050-3390
Publisher :
Astronomical Society of the Pacific, San Francisco, United States - California
Volume :
493
Pages :
151
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since 12 January 2016

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