The Algol type eclipsing binary X Tri: BVRI modelling and O-C diagram analysis

TL;DR

This paper presents CCD photometry, light curve modeling with the Wilson-Devinney code, and O-C diagram analysis of the Algol-type binary X Tri, revealing period variations possibly due to additional bodies and luminosity effects.

Contribution

It provides new geometric and photometric parameters for X Tri and investigates its period changes with a comprehensive O-C analysis, including potential multiple Light-Time Effects.

Findings

Detection of period variations suggestive of additional bodies.

Derived new geometric and photometric parameters for X Tri.

Evidence of luminosity contributions from potential third bodies.

Abstract

CCD photometric observations of the Algol-type eclipsing binary X Tri have been obtained. The light curves are analyzed with the Wilson-Devinney (WD) code and new geometric and photometric elements are derived. A new O-C analysis of the system, based on the most reliable timings of minima found in the literature, is presented and apparent period changes are discussed with respect to possible and multiple Light-Time Effect (LITE) in the system. Moreover, the results for the existence of additional bodies around the eclipsing pair, derived from the period study, are compared with those for extra luminosity, derived from the light curve analysis.