TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica

Hobson, Melissa J. and Trifonov, Trifon and Henning, Thomas and Jordán, Andrés and Rojas, Felipe and Espinoza, Nestor and Brahm, Rafael and Eberhardt, Jan and Jones, Matías I. and Mekarnia, Djamel and Kossakowski, Diana and Schlecker, Martin and Tala Pinto, Marcelo and Torres Miranda, Pascal José and Abe, Lyu and Barkaoui, Khalid and Bendjoya, Philippe and Bouchy, François and Buttu, Marco and Carleo, Ilaria and Collins, Karen A. and Colón, Knicole D. and Crouzet, Nicolas and Dragomir, Diana and Dransfield, Georgina and Gasparetto, Thomas and Goeke, Robert F. and Guillot, Tristan and Günther, Maximilian N. and Howard, Saburo and Jenkins, Jon M. and Korth, Judith and Latham, David W. and Lendl, Monika and Lissauer, Jack J. and Mann, Christopher R. and Mireles, Ismael and Ricker, George R. and Saesen, Sophie and Schwarz, Richard P. and Seager, S. and Sefako, Ramotholo and Shporer, Avi and Stockdale, Chris and Suarez, Olga and Tan, Thiam-Guan and Triaud, Amaury H. M. J. and Ulmer-Moll, Solène and Vanderspek, Roland and Winn, Joshua N. and Wohler, Bill and Zhou, George (2023) TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica. The Astronomical Journal, 166 (5). p. 201. ISSN 0004-6256

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Abstract

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 ${104.854}_{-0.002}^{+0.001}\,{\rm{day}}$ period, a mass of 0.17 ± 0.02 MJ, and a radius of 0.810 ± 0.005 RJ. 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 ${273.69}_{-0.22}^{+0.26}\,{\rm{days}}$ and an estimated mass of ${0.28}_{-0.01}^{+0.02}\,{M}_{{\rm{J}}}$. This period places it within the conservative habitable zone.

Item Type: Article
Subjects: OA Open Library > Physics and Astronomy
Depositing User: Unnamed user with email support@oaopenlibrary.com
Date Deposited: 14 Nov 2023 05:03
Last Modified: 14 Nov 2023 05:03
URI: http://archive.sdpublishers.com/id/eprint/2032

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