TIC 278956474: Two Close Binaries in One Young Quadruple System Identified by TESS,The Astronomical Journal

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TIC 278956474: Two Close Binaries in One Young Quadruple System Identified by TESS
The Astronomical Journal ( IF 5.3 ) Pub Date : 2020-07-23 , DOI: 10.3847/1538-3881/ab9d20
Pamela Rowden ₁ , Tams Borkovits _{2,

3} , Jon M. Jenkins ₄ , Keivan G. Stassun _{5,

6} , Joseph D. Twicken _{4,

7} , Elisabeth R. Newton ₈ , Carl Ziegler ₉ , Coel Hellier ₁₀ , Aylin Garcia Soto ₈ , Elisabeth C. Matthews ₁₁ , Ulrich Kolb ₁ , George R. Ricker ₁₁ , Roland Vanderspek ₁₁ , David W. Latham ₁₂ , S. Seager _{11,

13,

14} , Joshua N. Winn ₁₅ , Luke G. Bouma ₁₅ , Csar Briceo ₁₆ , David Charbonneau ₁₂ , William Fong ₁₁ , Ana Glidden _{11,

13} , Natalia M. Guerrero ₁₁ , Nicholas Law ₁₇ , Andrew W. Mann ₁₇ , Mark E. Rose ₄ , Joshua Schlieder ₁₈ , Peter Tenenbaum _{4,

7} , Eric B. Ting ₄

Affiliation

School of Physical Sciences, The Open University, Milton Keynes MK7 6AA, UK
Baja Astronomical Observatory of Szeged University, H-6500 Baja, Szegedi t, kt. 766, Hungary
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, H-1121 Budapest, Konkoly Thege Mikls t 15-17, Hungary
NASA Ames Research Center, Moffett Field, CA 94035, USA
Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, USA
Department of Physics, Fisk University, Nashville, TN 37208, USA
SETI Institute, Mountain View, CA 94043, USA
Department of Physics and Astronomy, Dartmouth College, Hanover, NH 03755, USA
Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario M5S 3H4, Canada
Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Center for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Department of Aeronautics and Astronautics, MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544, USA
Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile
Department of Physics and Astronomy, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3255, USA
NASA Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, MD 20771, USA

We have identified a quadruple system with two close eclipsing binaries in TESS data. The object is unresolved in Gaia and appears as a single source at parallax 1.08~$\pm$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 d), the smaller star is completely occluded by the larger star during the secondary eclipse; in the other (P = 5.674 d) both eclipses are grazing. Using these data, spectroscopy, speckle photometry, SED analysis and evolutionary stellar tracks, we have constrained the masses and radii of the four stars in the two eclipsing binaries. The Li I EW 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.

中文翻译：

TIC 278956474：TESS 识别出的一个年轻四重系统中的两个接近的双星

我们已经在 TESS 数据中确定了一个具有两个近食双星的四重系统。该物体在盖亚中未解析，并在视差 1.08~$\pm$0.01 mas 处作为单一来源出现。两个双星都有可观测的主日食和次日食，并在整个 TESS 周期 1（扇区 1-13）中受到监测，落在 TESS 连续观测区内。在一颗食双星（P = 5.488 d）中，较小的恒星在二次日食期间被较大的恒星完全遮挡；在另一个（P = 5.674 d）中，两个日食都在吃草。使用这些数据、光谱学、散斑光度法、SED 分析和恒星演化轨迹，我们限制了两个食双星中四颗恒星的质量和半径。Li I EW 表示年龄为 10-50 Myr，外部周期为 $858^{+7}_{-5}$ 天，

更新日期：2020-07-23

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