Physical properties of three short period close binaries: kic 2715417, kic 6050116 and kic 6287172

TL;DR

This study analyzes the physical properties of three short period close binary star systems using Kepler data, classifying their types and estimating their parameters through photometric methods without spectroscopic data.

Contribution

First detailed photometric analysis of three short period binaries using Kepler data with multiple methods to estimate their parameters.

Findings

KIC 2715417 is semi-detached with Roche lobe filling secondary

KIC 6050116 is an overcontact binary

KIC 6287172 is an ellipsoidal variable

Abstract

We present the physical parameters of three short period close binaries using the observed data from Kepler Space Telescope. All of these observations were taken in a single bandpass (which approximates the Johnson V-band). Our three systems are KIC 2715417, KIC 6050116 and KIC 6287172. The first system KIC 2715417 is considered a semi-detached system with the secondary component filling the Roche lobe. The second system KIC 6050116 is an overcontact system, while the third system KIC 6287172 belongs to ellipsoidal variables (ELV) as deduced from the Roche lobe geometry. For photometric analysis, we used PHOEBE software package which is based on the Wilson-Devinney code (Wilson-Devinney 1971). Due to lack of spectroscopic data, the photometric mass ratios are determined from the analyses of the light curves using the Q-search method. The absolute parameters are determined using three different methods, Harmanec (1988), Maceroni-Van't Veer (1996) and Gazeas-Niarchos (2006).