# The First Eclipsing Binary Catalogue from the MOA-II database

## TL;DR

This paper introduces the first catalog of over 8,000 eclipsing binary candidates from the MOA-II database, highlighting interesting systems and potential triples, advancing the study of binary star populations.

## Contribution

It provides the first comprehensive catalog of eclipsing binaries from MOA-II data, including analysis of special cases and detection of triple system candidates.

## Key findings

- Over 8,000 eclipsing binary candidates identified
- Examples of eccentric and phase-modulated binaries shown
- Three triple system candidates detected via eclipse timing variations

## Abstract

We present the first catalogue of eclipsing binaries in two MOA fields towards the Galactic bulge, in which over 8,000 candidates, mostly contact and semi-detached binaries of periods < 1 d, were identified. In this paper, the light curves of a small number of interesting candidates including eccentric binaries, binaries with noteworthy phase modulations and eclipsing RS CVn type stars are shown as examples. In addition, we identified three triple object candidates by detecting the light-travel-time effect in their eclipse time variation curves.