Precise modeling of the exoplanet host star and CoRoT main target HD 52265

M. E. Escobar, S. Théado, S. Vauclair, J. Ballot, S. Charpinet, N. Dolez, A. Hui-Bon-Hoa, G. Vauclair, L. Gizon, S. Mathur, P. O. Quirion, T. Stahn

Research output: Contribution to journalArticle

Abstract

Aims. This paper presents a detailed and precise study of the characteristics of the exoplanet host star and CoRoT main target HD 52265, derived from asteroseismic studies. We compare our results with previous estimates, and provide a comprehensive summary and discussion. Methods. Our basic method is similar to that previously used by the Toulouse group for solar-type stars. Models are computed with various initial chemical compositions and the computed p-mode frequencies are compared with the observed ones. All models include atomic diffusion and we discuss the importance of radiative accelerations. Several tests are used, including the usual frequency combinations and the fits to the échelle diagrams. Possible surface effects are introduced and discussed. Automatic codes are also used to identify the best-fit model for this star (SEEK and AMP) and their results are compared with those obtained with the detailed method. Results. We find precise results for the mass, radius, and age of this star, as well as its effective temperature and luminosity. We also estimate the initial helium abundance. These results are important for the characterization of the star-planet system.

Original languageEnglish (US)
Article numberA96
JournalAstronomy and Astrophysics
Volume543
DOIs
StatePublished - 2012

Keywords

  • Asteroseismology
  • Planet-star interactions
  • Stars: evolution
  • Stars: fundamental parameters
  • Stars: interiors
  • Stars: late-type

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Escobar, M. E., Théado, S., Vauclair, S., Ballot, J., Charpinet, S., Dolez, N., Hui-Bon-Hoa, A., Vauclair, G., Gizon, L., Mathur, S., Quirion, P. O., & Stahn, T. (2012). Precise modeling of the exoplanet host star and CoRoT main target HD 52265. Astronomy and Astrophysics, 543, [A96]. https://doi.org/10.1051/0004-6361/201218969