文章基本信息

标题：TIC 278956474: Two Close Binaries in One Young Quadruple System Identified by TESS
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作者：Pamela Rowden ; Tamás Borkovits ; Jon M.Jenkins 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2020
卷号：160
期号：2
页码：1-16
DOI：10.3847/1538-3881/ab9d20
语种：English
出版社：American Institute of Physics
摘要：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 5 7 days, our analysis indicates this is one of the most compact young 2 + 2 quadruple systems known.