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Six new compact triply eclipsing triples found with TESS

Maxted, P F L

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Abstract

In this work, we report the discovery and analysis of six new compact triply eclipsing triple star systems found with the TESS mission: TICs 37743815, 42565581, 54060695, 178010808, 242132789, and 456194776. All of these exhibit distinct third-body eclipses where the inner eclipsing binary (EB) occults the third ('tertiary') star, or vice versa. We utilized the TESS photometry, archival photometric data, and available archival spectral energy distribution curves (SED) to solve for the properties of all three stars, as well as many of the orbital elements. We describe in detail our SED fits, search of the archival data for the outer orbital period, and the final global photodynamical analyses. From these analyses, we find that all six systems are coplanar to within 0 degrees-5 degrees, and are viewed nearly edge on (i.e. within a couple of degrees). The outer orbital periods and eccentricities of the six systems are {P-out (days), e}: {68.7, 0.36}, {123, 0.16}, {60.7, 0.01}, {69.0, 0.29}, {41.5, 0.01}, {93.9, 0.29}, respectively, in the order the sources are listed above. The masses of all 12 EB stars were in the range of 0.7-1.8 M-circle dot and were situated near the main sequence. By contrast, the masses and radii of the tertiary stars ranged from 1.5 to 2.3 M-circle dot and 2.9 to 12 R-circle dot, respectively. We use this information to estimate the occurrence rate of compact flat triple systems..

Citation

Maxted, P. F. L., Rappaport, S. A., Borkovits, T., Gagliano, R., Jacobs, T. L., Kostov, V. B., …Stevens, D. J. (2022). Six new compact triply eclipsing triples found with TESS. Monthly Notices of the Royal Astronomical Society, 513(3), 4341-4360. https://doi.org/10.1093/mnras/stac957

Journal Article Type Article
Acceptance Date Apr 1, 2022
Online Publication Date Apr 7, 2022
Publication Date 2022-07
Publicly Available Date May 30, 2023
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 513
Issue 3
Pages 4341-4360
DOI https://doi.org/10.1093/mnras/stac957
Keywords Space and Planetary Science, Astronomy and Astrophysics
Publisher URL https://academic.oup.com/mnras/article-abstract/513/3/4341/6564734?redirectedFrom=fulltext

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