Two pairs of interacting EBs towards the LMC in the OGLE database

TL;DR

This paper reports the discovery of a compact hierarchical system of two pairs of interacting eclipsing binaries in the LMC, with near-resonant periods, identified through OGLE data, suggesting complex stellar interactions.

Contribution

It presents the identification of a rare, resonant quadruple system of eclipsing binaries in the LMC, highlighting the potential for discovering complex stellar systems in existing survey data.

Findings

Two superimposed EBs with near 3:2 resonance periods

Evidence suggests a hierarchical system rather than chance alignment

Potential for complex stellar interactions in the identified system

Abstract

A single point source on the OGLE LMC database shows the characteristics of two superimposed eclipsing binaries (EBs). The two EBs happen to have periods very close to the 3:2 resonance. The telescope's small PSF and the apparent resonance between the two EBs raises the suspicion that this is not chance alignment but rather a compact hierarchical system of two pairs of interacting EBs in 3:2 resonance.