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26 April 2024

» arxiv » 2002.9311

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A long period (P = 61.8-d) M5V dwarf eclipsing a Sun-like star from TESS and NGTS
Samuel Gill ; Benjamin F. Cooke ; Daniel Bayliss ; Louise D. Nielson ; Monika Lendl ; Peter J. Wheatley ; David R. Anderson ; Maximiliano Moyano ; Edward M. Bryant ; Jack S. Acton ; Claudia Belardi ; Francois Bouchy ; Matthew R. Burleigh ; Sarah L. Casewell ; Alexander Chausev ; Michael R. Goad ; James A.G. Jackman ; James S. Jenkins ; James McCormac ; Maximilian N. Gunther ; Hugh P. Osborn ; Don Pollaco ; Liam Raynard ; Alexis M. S. Smith ; Rosanna H. Tillbrook ; Oliver Turner ; Stephane Udry ; Jose I. Vines ; Christopher A. Watson ; Richard G. West ;
Date:	20 Feb 2020
Abstract:	The Transiting Exoplanet Survey Satellite (TESS) 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, Teff = 5500 +- 85 K) with NGTS and a third epoch with Las Cumbres Observatory’s (LCO) telescope in South Africa to constrain the orbital period (P = 61.777 d). Subsequent radial velocity measurements with CORALIE revealed the transiting object has a mass of M2 = 0.128 +- 0.003 M$_odot$, indicating the system is a G-M binary. The radius of the secondary is R2 = 0.154 +- 0.008 R$_odot$ and is consistent with models of stellar evolution to better than 1-$sigma$.
Source:	arXiv, 2002.9311
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