CoRoT-TESS eclipsing binaries with light-travel-time effect

TL;DR

This study analyzes eclipsing binaries observed by CoRoT and TESS, identifying potential triple systems through eclipse timing variations and light-travel-time effect analysis, revealing new candidates and other systems with significant ETV signals.

Contribution

First application of ETV analysis with LTTE to CoRoT and TESS eclipsing binaries, discovering four new potential triple systems.

Findings

Identified 4 new potential triple candidates among 1428 EBs.

Detected significant ETV signals possibly caused by mass transfer or apsidal motion.

Highlighted the effectiveness of LTTE analysis in space-based photometry data.

Abstract

Identifying long-period eclipsing binaries with space-based photometry is still a challenge even in the century of space telescopes due to the relatively short observation sequences and short lifetime of these missions. The Transiting Exoplanet Survey Satellite (TESS) space telescope is an appropriate tool to supplement previous space-based observations. In this paper we report the first results of the eclipse timing variation (ETV) analyses of eclipsing binaries (EBs) measured by CoRoT and TESS space telescopes. Among the 1428 EB candidates we found 4 new potential triple candidates, for which ETV was analysed and fitted by the well-known light-travel-time effect (LTTE). One of them shows significant phase shift in its folded light curve which required extra care. In this paper we also present some other systems showing significant ETV signals that could be explained by mass transfer or apsidal motion.