NGTS and WASP photometric recovery of a single-transit candidate from TESS
Author
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Gill, Samuel
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Bayliss, Daniel
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Cooke, Benjamin F
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Wheatley, Peter J.
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Nielsen, Louise D.
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Lendl, Monika
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McCormac, James
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Bryant, Edward M.
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Acton, Jack S.
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Anderson, David R.
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Belardi, Claudia
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Bouchy, François
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Burleigh, Matthew R.
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Cameron, Andrew Collier
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Casewell, Sarah L.
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Chaushev, Alexander
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Goad, Michael R.
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Günther, Maximilian N.
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Hellier, Coel
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Jackman, James A. G.
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Jenkins, James S.
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Moyano, Maximiliano
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Pollacco, Don
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Raynard, Liam
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Smith, Alexis M. S.
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Tilbrook, Rosanna H.
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Turner, Oliver
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Udry, Stéphane
Author
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West, Richard G.
Admission date
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2020-05-15T14:47:07Z
Available date
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2020-05-15T14:47:07Z
Publication date
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2020
Cita de ítem
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MNRAS 491, 1548–1553 (2020)
es_ES
Identifier
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10.1093/mnras/stz3212
Identifier
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https://repositorio.uchile.cl/handle/2250/174753
Abstract
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The Transiting Exoplanet Survey Satellite (TESS) produces a large number of single-transit event candidates, since the mission monitors most stars for only similar to 27 d. Such candidates correspond to long-period planets or eclipsing binaries. Using the TESS Sector 1 full-frame images, we identified a 7750 ppm single-transit event with a duration of 7 h around the moderately evolved F-dwarf star TIC-238855958 (T-mag = 10.23, T-eff = 6280 +/- 85 K). Using archival WASP photometry we constrained the true orbital period to one of three possible values. We detected a subsequent transit-event with NGTS, which revealed the orbital period to be 38.20 d. Radial velocity measurements from the CORALIE Spectrograph show the secondary object has a mass of M-2 = 0.148 +/- 0.003M(circle dot), indicating this system is an F-M eclipsing binary. The radius of the M-dwarf companion is R-2 = 0.171 +/- 0.003 R-circle dot, making this one of the most well characterized stars in this mass regime. We find that its radius is 2.3 sigma lower than expected from stellar evolution models.
es_ES
Patrocinador
dc.description.sponsorship
Science & Technology Facilities Council (STFC) ST/M001962/1 ST/S002642/1
Swiss National Science Foundation (SNSF)
Science & Technology Facilities Council (STFC) ST/L000733/1 ST/P000495/1 ST/R00384X/1 ST/N000757/1 ST/R003726/1
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT) CONICYT FONDECYT 1161218
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT) PB06
Science & Technology Facilities Council (STFC) ST/R000824/1
Juan Carlos Torres Fellowship
German Research Foundation (DFG) SPP 1992 RA 714/13-1