Rowden, P, Borkovits, T, Jenkins, JM, Stassun, KG, Twicken, JD, Newton, ER, Ziegler, C, Hellier, C, Soto, AG, Matthews, EC, Kolb, U, Ricker, GR, Vanderspek, R, Latham, DW, Seager, S, Winn, JN, Bouma, LG, Briceño, C, Charbonneau, D, Fong, W, Glidden, A, Guerrero, NM, Law, N, Mann, AW, Rose, ME, Schlieder, J, Tenenbaum, P and Ting, EB (2020) TIC 278956474: Two close binaries in one young quadruple system, identified by TESS. Astrophysical Journal, 160 (2). ISSN 0004-637X

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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.

Item Type: Article
Uncontrolled Keywords: Close binary stars, Eclipsing binary stars, Young stellar objects, Multiple stars
Subjects: Q Science > QB Astronomy > QB799 Stars
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 05 Oct 2020 15:59
Last Modified: 05 Oct 2020 16:01

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