Artículo de revista
TOI-222: a single-transit TESS candidate revealed to be a 34-day eclipsing binary with CORALIE, EulerCam and NGTS
Fecha
2020Registro en:
MNRAS, Vol. 492, No.2, (2020), 1761–1769
10.1093/mnras/stz3545
Autor
Lendl, Monika
Bouchy, Françoise
Gill, Samuel
Nielsen, Louise D.
Turner, Oliver
Stassun, Keivan
Acton, Jack S.
Anderson, David R.
Armstrong, David J.
Bayliss, Daniel
Belardi, Claudia
Bryant, Edward M.
Burleigh, Matthew R.
Chaushev, Alexander
Casewell, Sarah L.
Cooke, Benjamin F
Eigmüller, Philipp
Gillen, Edward
Goad, Michael R.
Günther, Maximilian N.
Hagelberg, Janis
Jenkins, James S.
Louden, Tom
Marmier, Maxime
McCormac, James
Moyano, Maximiliano
Pollacco, Don
Raynard, Liam
Tilbrook, Rosanna H.
Udry, Stéphane
Vines, José I.
West, Richard G.
Wheatley, Peter J.
Ricker, George
Vanderspek, Roland
Latham, David W.
Seager, Sara
Winn, Josh
Jenkins, Jon M.
Addison, Brett
Briceño, César
Brahm, Rafael
Caldwell, Douglas A.
Doty, John
Espinoza, Néstor
Goeke, Bob
Henning, Thomas
Jordán, Andrés
Krishnamurthy, Akshata
Law, Nicholas
Morris, Robert
Okumura, Jack
Mann, Andrew W.
Rodriguez, Joseph E.
Sarkis, Paula
Schlieder, Joshua
Twicken, Joseph D.
Villanueva, Steven
Wittenmyer, Robert A.
Wright, Duncan J.
Ziegler, Carl
Institución
Resumen
We report the period, eccentricity, and mass determination for the Transiting Exoplanet Survey Satellite (TESS) single-transit event candidate TOI-222, which displayed a single 3000 ppm transit in the TESS 2-min cadence data from Sector 2. We determine the orbital period via radial velocity measurements (P = 33.9 d), which allowed for ground-based photometric detection of two subsequent transits. Our data show that the companion to TOI-222 is a low-mass star, with a radius of 0.18(-0.10)(+0.39) R-circle dot and a mass of 0.23 +/- 0.01 M-circle dot. This discovery showcases the ability to efficiently discover long-period systems from TESS single-transit events using a combination of radial velocity monitoring coupled with high-precision ground-based photometry.