Confirmation of a Sub-Saturn-size Transiting Exoplanet Orbiting a G Dwarf: TOI-1194 b and a Very Low Mass Companion Star: TOI-1251 B from TESS
Zheng, Jie;
Bieryla, Allyson;
Howell, Steve B.;
Collins, Karen A.;
Buchhave, Lars A.;
Wang, Liang;
Gregorio, Joao;
Gao, Xing;
Murgas, Felipe;
Quinn, Sam;
Furlan, Elise;
Grupp, Frank;
Riffeser, Arno;
Kellermann, Hanna;
Girardin, Eric;
Yilmaz, Mesut;
Wang, Jia-Qi;
Jiang, Xiao-Jun;
Jensen, Eric;
Zhou, Ruo-Yu;
Wang, Hui-Juan
China, Germany, United States, Denmark, Switzerland, Portugal, Spain, Turkey
Abstract
We report the confirmation of a sub-Saturn-size exoplanet, TOI-1194 b, with a mass of about M J, and a very low mass companion star with a mass of about 96.5 ± 1.5 M J, TOI-1251 B. Exoplanet candidates provided by the Transiting Exoplanet Survey Satellite (TESS) are suitable for further follow-up observations by ground-based telescopes with small and medium apertures. The analysis is performed based on data from several telescopes worldwide, including telescopes in the Sino-German multiband photometric campaign, which aimed at confirming TESS Objects of Interest (TOIs) using ground-based small-aperture and medium-aperture telescopes, especially for long-period targets. TOI-1194 b is confirmed based on the consistent periodic transit depths from the multiband photometric data. We measure an orbital period of 2.310644 ± 0.000001 days, the radius is R J and the amplitude of the RV curve is m s‑1. TOI-1251 B is confirmed based on the multiband photometric and high-resolution spectroscopic data, whose orbital period is days, radius is R J and amplitude of the RV curve is m s‑1.
2024
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Research in Astronomy and Astrophysics
Gaia
2
