Paper detail

Multiply eclipsing candidates from the TESS satellite

We present the catalogue of the TESS targets showing multiple eclipses. It means that in all of these stars we detected two sets of eclipses, for which their two distinctive periods can be derived. These multiple stellar systems can be either doubly eclipsing quadruples, or triple-star coplanar systems showing besides the inner eclipses also the eclipses on the outer orbit. In total, 116 systems were found as doubly eclipsing, while 25 stars were identified as triply eclipsing triples. Several confirmed blends of two close sources were not included into our analysis. All these systems were identified scanning the known eclipsing systems taken from VSX database checking their TESS light curves. The average period of the dominant pair A is 2.7 days in our sample, while for the second pair B the average period is 5.3 days. Several systems show evident ETV changes even from the short interval of the TESS data, indicating possible period changes and short mutual orbit. We also present an evidence that the system V0871 Cen is probably a septuple-star system of architecture (Aa-Ab)-B-C-D. Most of the presented systems are adequately bright and showing deep enough eclipses, hence we call for new ground-based observations for these extremely interesting multiples. Owing to this motivation our catalog contains besides the ephemerides for both pairs also their depths of eclipses and the light curve shapes as extracted from the TESS data. These new ground based observations would be very useful for further derivation of the mutual movement of both pairs on their orbit via detection of the ETVs of both pairs for example.

preprint2022arXivOpen access
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