Three new 2+2 quadruple systems with changing inclination

Authors

Petr Zasche
Z. Henzl
M. Mašek
Jan Kára, The University of Texas Rio Grande ValleyFollow
H. Kučáková
J Merc
R. Uhlař

Document Type

Article

Publication Date

4-9-2025

Abstract

We present a unique discovery of three new detected systems showing two different phenomena together. These are 2+2 quadruple stellar systems showing two eclipsing binaries as the inner pairs. And besides that, these systems were also found to exhibit the precession of the inner orbits causing the inclination changes manifesting themselves through the eclipse depth variations. We are not aware of any similar known system on the sky nowadays, hence our discovery is really unique. In particular these systems are: CzeV4315 = HD 228777 (periods 6.7391 and 0.91932 d, inclination change of pair B of about 1.4∘ yr−1); ASASSN-V J075203.23−323102.7 = GDS_J0752031−323102 (8.86916 d + 2.6817 d, inclination change of pair B of about 1.03∘ yr−1, now only ellipsoidal variations); ASASSN-V J105824.33−611347.6 = TIC 465899856 (2.3304 d + 13.0033 d, inclination change of pair B, now undetectable). These systems provide us unique insight into the quadruple-star dynamics, including the orbit–orbit interaction, Kozai–Lidov cycles, and testing the stellar formation theories of these higher order multiples.

Comments

Post doc publication.

© 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited

Recommended Citation

Zasche, P., Z. Henzl, M. Mašek, J. Kára, H. Kučáková, J. Merc, and R. Uhlař. "Three new 2+ 2 quadruple systems with changing inclination." Monthly Notices of the Royal Astronomical Society 539, no. 2 (2025): 1015-1023. https://doi.org/10.1093/mnras/staf495

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Title

Monthly Notices of the Royal Astronomical Society

DOI

10.1093/mnras/staf495