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Asteroseismic investigation of planet host stars

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2017
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Abstract (EN)

Primary mission of Kepler and CoRoT is to find planets. Fundamental parameters of solar-like oscillating stars are percisesly determined by asteroseimology. Due to the connection between planetary and stellar parameters, asteroseismic investigation of solar-like oscillating host stars is crucial for the estimation of planetary parameters. For this reason, planet and planet-candidate host stars become main target for astrophysical researches. In this study, we concentrate on 22 planet and planet-candidate host stars on different evolution stages that exhibit solar-like oscillations. We construct stellar interior models of the host stars with MESA evolution code individually. We compute adiabatic oscillation frequencies of each stars using with ADIPLS code. We also conduct diagnostic tools from asteroseismology which are reference frequencies and obtain fundamental parameters of the host stars under influence of observational spectral and asteroseismic constraints. Mass range of the host stars is 0.74 Msun ≤ My ≤ 1.65 Msun. Among the planet-candidate host stars, KIC 7199397 is modelled for the first time in this study. We revised orbital and fundamental parameters of 36 planets and 5 planet-candidates. Difference between transit and the revised radius of Kepler-2b, Kepler-432b and Kepler-444c, d, e and f is 25 per cent. Radius range of the planets is 0.35 Rear < Rp < 16.50 Rear.

Author

Cenk Kayhan

How to Cite

Cenk Kayhan (Doctorate thesis). Asteroseismic investigation of planet host stars, 2017, Ege University.

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