Vol 24, No 3

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

Jia-Qi Wang, Xiao-Jun Jiang, Jie Zheng, Hanna Kellermann, Arno Riffeser, Liang Wang, Karen A. Collins, Allyson Bieryla, Lars A. Buchhave, Steve B. Howell et al


We report the confirmation of a sub-Saturn-size exoplanet, TOI-1194 b, with a mass of about MJ, and a very low mass companion star with a mass of about 96.5 ± 1.5 MJ, 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 RJ 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 RJ and amplitude of the RV curve is m s−1.


Key words: planets and satellites: fundamental parameters – planets and satellites: gaseous planets – stars: fundamental parameters – stars: low-mass – methods: data analysis – techniques: photometric

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