New eccentric eclipsing binary in triple system: SY Phe

TL;DR

This paper reports the discovery and analysis of a new eccentric eclipsing binary star system, SY Phe, within a triple system, based on multi-survey photometric data revealing its orbital and photometric characteristics.

Contribution

It provides the first detailed analysis of SY Phe as a detached eclipsing binary with a third component, including orbital parameters and photometric behavior.

Findings

SY Phe is a detached eclipsing binary with similar components.

Orbital period is approximately 5.27089 days with slight eccentricity.

The system shows additional long-term photometric variations.

Abstract

Analyzing available photometry from Hipparcos, ASAS, Pi of the sky and Super WASP, we found that the system SY Phe is a detached eclipsing binary with similar components and orbital period about 5.27089 days. It has a slightly eccentric orbit, however the apsidal motion is probably very slow. The system undergoes an additional photometric variation on longer time scales superimposed on the eclipsing light curve. It also contains one distant component, hence the third light was also considered.