A long-period (P = 61.8 d) M5V dwarf eclipsing a Sun-like star from TESS and NGTS
- Gill, Samuel
- Cooke, Benjamin F.
- Bayliss, Daniel
- Nielsen, Louise D.
- Lendl, Monika
- Wheatley, Peter J.
- Anderson, David R.
- Moyano, Maximiliano
- Bryant, Edward M.
- Acton, Jack S.
- Belardi, Claudia
- Bouchy, Francois
- Burleigh, Matthew R.
- Casewell, Sarah L.
- Chaushev, Alexander
- Goad, Michael R.
- Jackman, James A.~G.
- Jenkins, James S.
- McCormac, James
- Günther, Maximilian N.
- Osborn, Hugh P.
- Pollacco, Don
- Raynard, Liam
- Smith, Alexis M S
- Tilbrook, Rosanna H.
- Turner, Oliver
- Udry, Stéphane
- Vines, Jose I.
- Watson, Christopher A.
- West, Richard G.
DOIAbstract
The Transiting Exoplanet Survey Satellite has produced a large number of single-transit event candidates which are being monitored by the Next Generation Transit Survey (NGTS). We observed a second epoch for the TIC-231005575 system (Tmag = 12.06 and Teff=5500±85K ) with NGTS and a third epoch with Las Cumbres Observatory's telescope in South Africa to constrain the orbital period ( P=61.777d ). Subsequent radial velocity measurements with CORALIE revealed the transiting object has a mass of M2 = 0.128 ± 0.003 M☉, indicating the system is a G-M binary. The radius of the secondary is R2 = 0.154 ± 0.008 R☉ and is consistent with MESA models of stellar evolution to better than 1σ
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