# KIC 7385478: An eclipsing binary with a {\gamma} Doradus component

## TL;DR

This study analyzes the eclipsing binary KIC 7385478, revealing a primary ba0Doradus pulsator with ba0Doradus pulsations and secondary star activity, combining spectroscopic and Kepler photometric data.

## Contribution

It provides the first detailed spectroscopic and photometric analysis of KIC 7385478, identifying ba0Doradus pulsations and characterizing the system's stellar parameters.

## Key findings

- Primary component is a ba0Doradus pulsator.
- Detected ba0Doradus pulsations with a period of ba00.5 days.
- Secondary star activity influences residual light variations.

## Abstract

We present spectroscopic and photometric analysis of the eclipsing binary KIC\,7385478. We find that the system is formed by F1V + K4III-IV components. Combining results from analysis of spectroscopic data and $Kepler$ photometry, we calculate masses and radii of the primary and the secondary components as M$_{1}$ = 1.71 $\pm$ 0.08 \Msun, M$_{2}$ = 0.37 $\pm$ 0.04 \Msun~ and R$_{1}$ = 1.59 $\pm$ 0.03\Rsun, R$_{2}$ = 1.90 $\pm$ 0.03\Rsun, respectively. Position of the primary component in HR diagram is in the region of $\gamma$ Doradus type pulsators and residuals from light curve modeling exhibit additional light variation with a dominant period of $\sim$0.5 day. These are clear evidences of the $\gamma$ Doradus type pulsations on the primary component. We also observe occasional increase in amplitude of the residuals, where the orbital period becomes the most dominant period. These may be attributed to the cool star activity originating from the secondary component.