GSC 2314-0530: the shortest-period eclipsing system with dMe components

TL;DR

This paper presents detailed photometric and spectroscopic analysis of GSC 2314-0530, the shortest-period eclipsing binary with dMe stars, revealing its fundamental parameters and chromospheric activity.

Contribution

It provides the first comprehensive global parameters and activity analysis of the shortest-period dMe eclipsing binary, expanding understanding of low-mass stellar systems.

Findings

Determined the system's fundamental parameters: masses, radii, temperatures, and luminosities.

Revealed strong chromospheric activity through H_alpha emission and flares.

Derived empirical relations for low-mass binary components.

Abstract

CCD photometric observations in VRI colors and spectroscopic observations of the newly discovered eclipsing binary GSC 2314-0530 (NSVS 6550671) with dMe components and very short period of P=0.192636 days are presented. The simultaneous light-curve solution and radial velocity solution allows to determine the global parameters of GSC 2314-0530: T_{1}=3735 K; T_{2}=3106 K; M_{1}=0.51 M_sun; M_{2}=0.26 M_sun; R_{1}=0.55 R_sun; R_{2}=0.29 R_sun; L_{1}=0.053 L_sun; L_{2}=0.007 L_sun; i=72.5 degr; a=1.28 R_sun; d=59 pc. The chromospheric activity of its components is revealed by strong emission in the H_alpha line (with mean EW=5 A) and observed several flares. Empirical relations mass-M_{bol}, mass-radius and mass-temperature are derived on the basis of the parameters of known binaries with low-mass dM components.