TIC 278956474: Two Close Binaries in One Young Quadruple System Identified by TESS

Pamela Rowden, Tamás Borkovits, Jon M. Jenkins, Keivan G. Stassun, Joseph D. Twicken, Elisabeth R. Newton, Carl Ziegler, Coel Hellier, Aylin Garcia Soto, Elisabeth C. Matthews, Ulrich Kolb, George R. Ricker, Roland Vanderspek, David W. Latham, S. Seager, Joshua N. Winn, Luke G. Bouma, César Briceño, David Charbonneau, William FongAna Glidden, Natalia M. Guerrero, Nicholas Law, Andrew W. Mann, Mark E. Rose, Joshua Schlieder, Peter Tenenbaum, Eric B. Ting

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


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.

Original languageEnglish (US)
Article number76
JournalAstronomical Journal
Issue number2
StatePublished - Aug 2020

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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