KIC 2557430: A Triple System Containing One Gamma Dor and Two Flaring Components?

TL;DR

This study analyzes the eclipsing binary KIC 2557430, revealing it as a potential triple system with a Gamma Doradus star, a chromospherically active star, and a flaring third component, based on detailed frequency and flare analysis.

Contribution

The paper provides the first detailed analysis indicating KIC 2557430 is a triple system with distinct flaring sources and stellar components, including a Gamma Doradus star.

Findings

50 frequencies identified, mostly from the primary Gamma Doradus star.

69 flares detected, originating from two different sources.

Evidence suggests the system includes a Gamma Doradus star, a chromospherically active star, and a flaring third body.

Abstract

The results are presented for eclipsing binary KIC 2557430. The mass ratio was computed as 0.868+-10.002, while the inclination (i) was found as 69.75+-0.01 deg with T2=6271+-1 K. 50 frequencies were found in the period analysis. 48 frequencies of them are caused due to the primary component, a Gamma Doradus star, while two of them are caused by the cool spots. 69 flares were detected in the analyses. Two OPEA models were derived for flares, which indicates that the flares were come from two different sources. The Plateau value was found to be 1.4336+-0.1104 s for Source 1, which is seen as possible the secondary component and 0.7550+-0.0677 s for Source 2, which is seen as possible third body. The half-life value was computed as 2278.1 s for Group 1 and 1811.2 s for Group 2. The flare frequency N1 was found to be 0.02726 h-1 and N2 was computed as 0.00002 for Group 1, while N1 was found to be 0.01977 h-1 and N2 was computed as 0.00001 for Group 2. In a results, KIC 2557430 is a possible triple system consisting of a Gamma Doradus-type star, a chromospherically active star, and also a flaring third body.