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Hobson, M.J.; Trifonov, T.; Henning, T.; Jordan, A.; Rojas, F.; Espinoza, N.; Brahm, R.; Eberhardt, J.; Jones, M.I.; Mekarnia, D.; Kossakowski, D.; Schlecker, M.; Pinto, M.T.; Miranda, P.J.T.; Abe, L.; Barkaoui, K.; Bendjoya, P.; Bouchy, F.; Buttu, M.; Carleo, I.; Collins, K.A.; Colon, K.D.; Crouzet, N.; Dragomir, D.; Dransfield, G.; Gasparetto, T.; Goeke, R.F.; Guillot, T.; Guenther, M.N.; Howard, S.; Jenkins, J.M.; Korth, J.; Latham, D.W.; Lendl, M.; Lissauer, J.J.; Mann, C.R.; Mireles, I.; Ricker, G.R.; Saesen, S.; Schwarz, R.P.; Seager, S.; Sefako, R.; Shporer, A.; Stockdale, C.; Suarez, O.; Tan, T.G.; Triaud, A.H.M.J.; Ulmer-Moll, S.; Vanderspek, R.; Winn, J.N.; Wohler, B.; Zhou, G.R. |
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Title |
Alert Results TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica 41 of 41 TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica |
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2023 |
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Astronomical Journal |
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Astron. J. |
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166 |
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5 |
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201 |
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MAGNETIC ACTIVITY; ERROR-CORRECTION; EXOPLANET YIELD; I-ARCHITECTURE; ASTEP 400; MODEL; TELESCOPE; SYSTEMS; JUPITER; CODE |
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We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a full 6.5 hr long transit, PEST, Hazelwood, and LCO; space photometry from NEOSSat; and radial velocities (RVs) from FEROS, HARPS, CORALIE, and CHIRON. Orbiting a late G-type star, TOI-199 b has a 104.854-0.002+0.001day period, a mass of 0.17 +/- 0.02 M J, and a radius of 0.810 +/- 0.005 R J. It is the first warm exo-Saturn with a precisely determined mass and radius. The TESS and ASTEP transits show strong transit timing variations (TTVs), pointing to the existence of a second planet in the system. The joint analysis of the RVs and TTVs provides a unique solution for the nontransiting companion TOI-199 c, which has a period of 273.69-0.22+0.26days and an estimated mass of 0.28-0.01+0.02MJ . This period places it within the conservative habitable zone. |
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0004-6256 |
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WOS:001098090800001 |
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UAI @ alexi.delcanto @ |
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1933 |
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