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Validation of asteroseismic fitting with the new white dwarf evolution code

Published online by Cambridge University Press:  09 October 2020

Agnès Kim Open the ORCID record for Agnès Kim [Opens in a new window]
Agnès Kim*
Affiliation:
Penn State Scranton, 120 Ridgeview Drive, Scranton, PA 18447, USA email: [email protected]
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Abstract

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The new version of the White Dwarf Evolution Code (Bischoff-Kim & Montgomery 2018) overcomes limitations of earlier versions by utilizing MESA modules for the equations of state and opacities, now allowing regions of the model with a mix of helium, carbon, and oxygen. This single improvement allows us to almost exactly replicate models output by other stellar evolution codes. Armed with this new capability, we use as a star to fit, a hydrogen atmosphere white dwarf model from the La Plata group (using the LPCODE). We present results of fitting different subsets of periods for that model. This allows us some validation of our fitting methods, knowing exactly what properties we should be recovering in our best fit model.

Keywords

stars: interiorsstars: oscillations (including pulsations)stars: white dwarfs
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S357: White Dwarfs as Probes of Fundamental Physics: Tracers of Planetary, Stellar and Galactic Evolution , October 2019 , pp. 114 - 118
Copyright
© International Astronomical Union 2020

References

Bell, K. J., Córsico, A. H., Bischoff-Kim, A., et al. 2019, arXiv e-prints, arXiv:1910.04180Google Scholar
Bischoff-Kim, A. 2017, European Physical Journal Web of Conferences, 06011CrossRefGoogle Scholar
Bischoff-Kim, A. & Montgomery, M. H. 2018, Astronomical Journal, 155, 187CrossRefGoogle Scholar
Bischoff-Kim, A. 2018, Non-luminous sources of cooling in pulsating white dwarfs (https://doi.org/10.5281/zenodo.1715917).CrossRefGoogle Scholar
Romero, A. D., Córsico, A. H., Althaus, L. G., et al. 2012, arXiv e-prints, arXiv:1204.6101Google Scholar