TOI-481 b and TOI-892 b: Two Long-period Hot Jupiters from the Transiting Exoplanet Survey SatelliteRevista : Astronomical Journal
Volumen : 160
Número : 5
Páginas : 235
Tipo de publicación : ISI Ir a publicación
We present the discovery of two new 10 day period giant planets from the Transiting Exoplanet Survey Satellite mission, whose masses were precisely determined using a wide diversity of ground-based facilities. TOI-481 b and TOI-892 b have similar radii (0.99 ± 0.01 RJ and 1.07 ± 0.02 RJ , respectively), and orbital periods (10.3311 days and 10.6266 days, respectively), but significantly different masses (1.53 ± 0.03 MJ versus 0.95 ± 0.07 MJ , respectively). Both planets orbit metal-rich stars ( [Fe/H] = +0.26±0.05 dex and [Fe/H] = +0.24±0.05 for TOI-481 and TOI-892, respectively) but at different evolutionary stages. TOI-481 is a M? = 1.14 ± 0.02 M? , R? = 1.66 ± 0.02 R? G-type star ( Teff = 5735±72 K), that with an age of 6.7 Gyr, is in the turn-off point of the main sequence. TOI-892 on the other hand, is a F-type dwarf star ( Teff = 6261±80 K), which has a mass of M? = 1.28 ± 0.03 M? and a radius of R? = 1.39 ± 0.02 R? . TOI-481 b and TOI-892 b join the scarcely populated region of transiting gas giants with orbital periods longer than 10 days, which is important to constrain theories of the formation and structure of hot Jupiters.