KIC 7385478: An Eclipsing Binary with a gamma Doradus Component


ÖZDARCAN O. , DAL H. A.

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA, vol.34, 2017 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34
  • Publication Date: 2017
  • Doi Number: 10.1017/pasa.2017.11
  • Title of Journal : PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA

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 +/- 0.08 M-circle dot, M-2 = 0.37 +/- 0.04 M-circle dot and R-1 = 1.59 +/- 0.03 R-circle dot, R-2 = 1.90 +/- 0.03 R-circle dot, respectively. Position of the primary component in HR diagram is in the region of. Doradus type pulsators and residuals from light curve modelling exhibit additional light variation with a dominant period of similar to 0.5 d. These are clear evidences of the. 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.