The complex dynamical past and future of double eclipsing binary CzeV343: Misaligned orbits and period resonance

Pejcha, Ondřej; Cagaš, P.; Landri, Camille; Fausnaugh, Michael; Rosa, Gisella De; Prieto, J. L.; Henzl, Z.; Pešta, Martin

doi:10.1051/0004-6361/202244335

Cited by 3 publications

(1 citation statement)

References 91 publications

(114 reference statements)

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“…After a few (usually two to five) iterative steps, a shape for the eclipsing light curve of the C pair was clearly obtained. The method itself and the code used here are described in the Appendix of Pejcha et al (2022).…”

Section: Three Methods For Disentanglingmentioning

confidence: 99%

V994 Her: A Unique Triply Eclipsing Sextuple Star System

Zasche¹,

Borkovits²,

Jayaraman³

et al. 2023

Preprint

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We report the discovery with TESS of a third set of eclipses from V994 Herculis (TIC 424508303), previously only known as a doubly-eclipsing system. The key implication of this discovery and our analyses is that V994 Her is the second fully-characterized (2+2) + 2 sextuple system, in which all three binaries eclipse. In this work, we use a combination of ground-based observations and TESS data to analyze the eclipses of binaries A and B in order to update the parameters of the inner quadruple's orbit (with a derived period of 1062 ± 2 d). The eclipses of binary C that were detected in the TESS data were also found in older ground-based observations, as well as in more recently obtained observations. The eclipse timing variations of all three pairs were studied in order to detect the mutual perturbations of their constituent stars, as well as those of the inner pairs in the (2+2) core. At the longest periods they arise from apsidal motion, which may help constraining parameters of the component stars' internal structure. We also discuss the relative proximity of the periods of binaries A and B to a 3:2 mean motion resonance. This work represents a step forward in the development of techniques to better understand and characterize multiple star systems, especially those with multiple eclipsing components.

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Section: Three Methods For Disentanglingmentioning

confidence: 99%

V994 Her: A Unique Triply Eclipsing Sextuple Star System

Zasche¹,

Borkovits²,

Jayaraman³

et al. 2023

Preprint

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The value-added catalogue of ASAS-SN eclipsing binaries – II. Properties of extra-physics systems

Rowan

Jayasinghe

Stanek

et al. 2023

Monthly Notices of the Royal Astronomical Society

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Detached eclipsing binaries are the primary tool used to measure precise masses and radii of stars. In our previous paper estimating the parameters of more than 30,000 detached eclipsing binaries, we identified 766 eclipsing binaries with additional features in their All-Sky Automated Survey for Supernovae (ASAS-SN) and Transiting Exoplanet Survey Satellite (TESS) light curves. Here, we characterize these ‘extra-physics’ systems, identifying eclipsing binaries with spotted stars, pulsating components, and candidate triple/quadruple systems. We use the Gaia, ATLAS, ZTF, and ASAS-SN variable star catalogs to search for possible blends. We use MIST isochrones and evolutionary tracks to identify systems with main sequence, subgiant, and giant primaries and highlight systems in sparsely populated regions of the color-magnitude diagram. We find that the orbital period distribution of spotted binaries is divided by evolutionary state and find 68 with X-ray detections. For the candidate triple/quadruples and pulsating systems, we calculate the extra orbital/pulsational period and identify systems with resonances. Finally, we highlight a number of exotic systems, including eclipsing CVs, subdwarfs, and binaries with disks.

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V994 Herculis: a unique triply eclipsing sextuple star system

Zasche

Borkovits

Jayaraman

et al. 2023

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We report the discovery with TESS of a third set of eclipses from V994 Herculis (TIC 424508303), previously only known as a doubly-eclipsing system. The key implication of this discovery and our analyses is that V994 Her is the second fully-characterized (2+2) + 2 sextuple system, in which all three binaries eclipse. In this work, we use a combination of ground-based observations and TESS data to analyze the eclipses of binaries A and B in order to update the parameters of the inner quadruple’s orbit (with a derived period of 1062 ± 2 d). The eclipses of binary C that were detected in the TESS data were also found in older ground-based observations, as well as in more recently obtained observations. The eclipse timing variations of all three pairs were studied in order to detect the mutual perturbations of their constituent stars, as well as those of the inner pairs in the (2+2) core. At the longest periods they arise from apsidal motion, which may help constraining parameters of the component stars’ internal structure. We also discuss the relative proximity of the periods of binaries A and B to a 3:2 mean motion resonance. This work represents a step forward in the development of techniques to better understand and characterize multiple star systems, especially those with multiple eclipsing components.

show abstract

The complex dynamical past and future of double eclipsing binary CzeV343: Misaligned orbits and period resonance

Cited by 3 publications

References 91 publications

V994 Her: A Unique Triply Eclipsing Sextuple Star System

V994 Her: A Unique Triply Eclipsing Sextuple Star System

The value-added catalogue of ASAS-SN eclipsing binaries – II. Properties of extra-physics systems

V994 Herculis: a unique triply eclipsing sextuple star system

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