Precise Modeling of the Exoplanet Host Star and CoRoT Main Target HD 52265

Abstract

This paper presents a detailed and precise study of the characteristics of the Exoplanet Host Star and CoRoT main target HD 52265, as derived from asteroseismic studies. The results are compared with previous estimates, with a comprehensive summary and discussion. The 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 the importance of radiative accelerations is discussed. Several tests are used, including the usual frequency combinations and the fits of the échelle diagrams. The possible surface effects are introduced and discussed. Automatic codes are also used to find the best model for this star (SEEK, AMP) and their results are compared with that obtained with the detailed method. We find precise results for the mass, radius and age of this star, as well as its effective temperature and luminosity. We also give an estimate of the initial helium abundance. These results are important for the characterization of the star-planet system.

9 pages, 6 figures, 7 tables, to be published in Astronomy and Astrophysics

References in corpus (8)

• ADIPLS -- the Aarhus adiabatic oscillation package
• Correcting stellar oscillation frequencies for near-surface effects
• ASTEC -- the Aarhus STellar Evolution Code
• A Stellar Model-fitting Pipeline for Asteroseismic Data from the Kepler Mission
• Accurate p-mode measurements of the G0V metal-rich CoRoT target HD 52265
• The exoplanet-host star iota Horologii: an evaporated member of the primordial Hyades cluster
• Asteroseismology of solar-type stars: signatures of convective and/or helium cores
• The CoRoT primary target HD 52265: models and seismic tests

Cited by in corpus (22)

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• Asteroseismic determination of obliquities of the exoplanet systems Kepler-50 and Kepler-65
• Asteroseismology for "à la carte" stellar age-dating and weighing: Age and mass of the CoRoT exoplanet host HD 52265
• Seismic constraints on rotation of Sun-like star and mass of exoplanet
• CoRoT: harvest of the exoplanet program
• Transit confirmation and improved stellar and planet parameters for the super-Earth HD 97658 b and its host star
• Why should we correct reported pulsation frequencies for stellar line-of-sight Doppler velocity shifts?
• A 20-Second Cadence View of Solar-Type Stars and Their Planets with TESS: Asteroseismology of Solar Analogs and a Re-characterization of pi Men c
• First asteroseismic limits on the nature of dark matter
• The new Toulouse-Geneva Stellar Evolution Code including radiative accelerations of heavy elements
• Fundamental properties of Kepler and CoRoT targets: III. Tuning scaling relations using the first adiabatic exponent
• Convective boundary mixing in low- and intermediate-mass stars I. Core properties from pressure-mode asteroseismology
• How accurate are stellar ages based on stellar models? II. The impact of asteroseismology
• Study of HD 169392A observed by CoRoT and HARPS
• Seismic signature of envelope penetrative convection: the CoRoT star HD 52265
• Asteroseismic determination of fundamental parameters of sun-like stars using multi-layered neural networks
• The asteroseismic potential of CHEOPS
• Asteroseismic Investigation of 20 Planet and Planet-Candidate Host Stars
• Impact of asteroseismology on improving stellar ages determination