TIC 278956474: Two Close Binaries in One Young Quadruple System Identified by TESS
Name
Rowden_2020_AJ_160_76.pdf
Description
Published version
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2.92 MB
Format
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Checksum (MD5)
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Author(s)
Rowden, Pamela
Borkovits, Tamás
Jenkins, Jon M
Stassun, Keivan G
Twicken, Joseph D
Newton, Elisabeth R
Ziegler, Carl
Hellier, Coel
Soto, Aylin Garcia
Matthews, Elisabeth C
Date Issued
2020
Journal
Astronomical Journal
Publisher
American Astronomical Society
Version
Final published version
Abstract
© 2020. The American Astronomical Society. All rights reserved. We have identified a quadruple system with two close eclipsing binaries in Transiting Exoplanet Survey Satellite (TESS) data. The object is unresolved in Gaia and appears as a single source at parallax 1.08 ± 0.01 mas. Both binaries have observable primary and secondary eclipses and were monitored throughout TESS Cycle 1 (sectors 1-13), falling within the TESS Continuous Viewing Zone. In one eclipsing binary (P = 5.488 days), the smaller star is completely occluded by the larger star during the secondary eclipse; in the other (P = 5.674 days) both eclipses are grazing. Using these data, spectroscopy, speckle photometry, spectral energy distribution analysis, and evolutionary stellar tracks, we have constrained the masses and radii of the four stars in the two eclipsing binaries. The Li i equivalent width indicates an age of 10-50 Myr and, with an outer period of 858+7-5 days, our analysis indicates this is one of the most compact young 2 + 2 quadruple systems known.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
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DOI of Published Version
https://doi.org/10.3847/1538-3881/AB9D20
