The GAPS Programme with HARPS-N at TNG. XXXV. Fundamental properties of transiting exoplanet host stars

Abstract

Context. Exoplanetary properties strongly depend on stellar properties: "to know the planet" with accuracy and precision it is necessary "to know the star" as accurately and precisely as possible. Aims. Our immediate aim is to characterize in a homogeneous and accurate way a sample of 27 transiting planet-hosting stars observed within the Global Architecture of Planetary System program. For the wide visual binary XO-2, we considered both components (N: hosting a transiting planet; S: without a known transiting planet). Our final goal is to widely analyze the sample by deriving several stellar properties, abundances of many elements, kinematic parameters, and discuss them in a context of planetary formation. Methods. We determined stellar parameters (effective temperature, surface gravity, rotational velocity) and abundances of 26 elements (Li,

The GAPS Programme at TNG XXXIX. Multiple Molecular Species in the Atmosphere of the Warm Giant Planet WASP-80 b Unveiled at High Resolution with GIANO-B ∗

“…Within this range of possibilities, if the planet had a superstellar metallicity, combined with the solar C/O ratio estimation for WASP-80b, our observations would favor formation scenarios where the giant planet accreted a significant mass of planetesimals while migrating through its native circumstellar disk (Turrini et al 2021, Pacetti et al 2022. While the current data do not allow to draw stronger conclusions (e.g., on the extent of WASP-80b's migration), our NH3 detection makes WASP-80b a prime target for future efforts to quantify the abundances of C, O, and N in its atmosphere and use their ratios to probe its formation history in more details (Kolecki & Wang 2021;Turrini et al 2021Turrini et al , 2022Biazzo et al 2022;Pacetti et al 2022). In particular, the present work will complement and help in the interpretation of JWST spectra of WASP-80 b whose transit and eclipse observations are planned through the GTO programs (PIDs 1177(PIDs , 1185(PIDs , and 1201.…”

“…While the current data do not allow to draw stronger conclusions (e.g. on the extent of WASP-80b's migration), our NH3 detection makes WASP-80b a prime target for future efforts to quantify the abundances of C, O and N in its atmosphere and use their ratios to probe its formation history in more details (Turrini et al 2021a,b;Kolecki & Wang 2021;Biazzo et al 2022;Pacetti et al 2022). In particular, the present work will complement and help in the interpretation of JWST spectra of WASP-80 b whose transit and eclipse observations are planned through the GTO programs (PIDs 1177(PIDs , 1185(PIDs , and 1201.…”