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

Document Type

Article

Publication Date

3-1-2024

Published In

Research In Astronomy And Astrophysics

Abstract

We report the confirmation of a sub-Saturn-size exoplanet, TOI-1194 b, with a mass of about 0.456 +0.055/-0.051 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 0.767 +0.045/-0.041 RJ and the amplitude of the RV curve is 69.4 +7.9/-7.3 m s⁻¹. TOI-1251 B is confirmed based on the multiband photometric and high-resolution spectroscopic data, whose orbital period is 5.973054 +0.000002/-0.000001 days, radius is 0.947 +0.035/-0.033 RJ and amplitude of the RV curve is 9849 +42/-40 m s⁻¹.

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Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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