TESS hot Jupiter candidates CAFE follow-up

Each hosts a hot-Jupiter candidate detected by the TESS mission. We characterize these stars and jointly model the CAFE radial velocities and the TESS photometric data to unravel the nature of the transiting objects and to infer their properties. The objects confirmed to be new planets are TOI-603 b (mass 33.0^+6.5^_-6.2_M_{Earth}_, period 16.2d), TOI-2114 b (1.01^+0.146^_-0.12_M_{jup}_, 6.2 d), TOI-4492 b (5.92^+0.67^_-0.64_M_{jup}_, 4.4d), TOI-5806 b (2.77^+0.34^_-0.32_M_{jup}_, 3.2d), and TOI-5811 B b (0.81^+0.11^_-0.10_M_{jup}_, 6.3d).

Based on their masses and periods, TOI-603 b is a member of the "Neptune savanna", while TOI-2114 b, TOI-4492 b, TOI-5806 b, and TOI-5811 B b are hot Jupiters orbiting slightly evolved stars. We found the candidate TOI-5811.01 to actually be a planet but orbiting the nearby bound companion TOI-5811 B. We also identify a bound stellar companion to TOI-5806 at a projected separation of 248 au, thus both forming S-type (satellite-type) planetary systems.

As for the other two candidates, TOI-1837.01 is definitely an eclipsing binary, while the nature of TOI-1137.01 remains indeterminate. The five newly confirmed planets orbit relatively bright stars (G=8.6-10.2mag) and four of them are excellent candidates for atmospheric studies (with transmission spectroscopy metrics exceeding 90 for TOI-603 b, TOI-2114 b, TOI-5806 b, and TOI-5811 B b). The complex configurations of all these systems underscore the need for intensive follow-up efforts to clarify the nature of transiting planet candidates.