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| Paper: |
Method and Tools for an Objective Approach of White Dwarf Asteroseismology |
| Volume: |
493, 19th European Workshop on White Dwarfs |
| Page: |
151 |
| Authors: |
Charpinet, S.; Giammichele, N.; Brassard, P.; Van Grootel, V.; Fontaine, G. |
| Abstract: |
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. |
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