Successful Asteroseismology for a Better Characterization of the Exoplanet HAT-P-7b

TL;DR

This paper demonstrates how asteroseismology, applied to Kepler data of HAT-P-7, improves the characterization of the host star and refines the properties of its exoplanet, HAT-P-7b.

Contribution

It presents a detailed asteroseismic analysis of HAT-P-7 using TDC models and revises the exoplanet's parameters based on stellar insights.

Findings

Refined stellar parameters for HAT-P-7.

Updated exoplanet properties based on asteroseismic data.

Enhanced understanding of star-planet system dynamics.

Abstract

It is well known that asteroseismology is the unique technique permitting the study of the internal structure of pulsating stars using their pulsational frequencies, which is per se very important. It acquires an additional value when the star turns out to be a planet host. In this case, the asteroseismic study output may be a very important input for the study of the planetary system. With this in mind, we use the large time-span of the Kepler public data obtained for the star system HAT-P-7, first to perform an asteroseismic study of the pulsating star using Time-Dependent-Convection (TDC) models. Secondly, we make a revision of the planet properties in the light of the asteroseismic study.