Seminario: Serena Benatti (INAF), 18 Marzo ore 11

Speaker: Serena Benatti (INAF)

Titolo: Constraining young transiting planets: the case of DS Tuc A b

Abstract:

Transit space missions are deeply changing our view of young planetary systems at close separations. They suggest that Neptune-size planets are more common than gas giant companions around young stars (age less than a few hundreds of Myr). This result is in contrast with the previous claims based on the radial velocity method only, which is however affected by the strong level of the stellar activity.
After a short review of the current scenario, I will focus the attention on one of the first attempts to characterize a young transiting planet, DS Tucanae A b (age ~ 40 Myr, orbital period ~ 8.14 d, radius ~ 5.6 Rearth), detected with TESS in 2019. Our combined observational campaigns involved spectroscopic follow-up for mass detection, orbital obliquity determination and atmospheric characterization, and high-energy observations used to investigate different models for the planet atmospheric escape.