GAPS2: Transit-Radial Velocity Synergy to Unveil the Young Exoplanet Population History

Dr. Ilaria Carleo
Instituto de Astrofisica de Canarias
La Laguna, Tenerife (SP)

Villa Magliola seminars room



The “GAPS” (Global Architecture of Planetary Systems) project gathers a large part of the Italian community working on exoplanets.
One of our aims, with the Young Objects sub-program of GAPS2 (GAPS-YO), is the search for young exoplanets, since they are the key targets to study the early evolution of planetary systems and to understand the origin of their observed diversity.
Transit space missions are significantly contributing in our view of young planetary systems at close separations, providing robust candidates to be followed-up with the radial velocity (RV) technique and to investigate their orbital and physical evolution.

Indeed, these targets are also useful to validate models of planetary evolution as the result of the atmospheric photo-evaporation due to the high-energy irradiation of the young stellar host.
GAPS-YO searches for young planets by surveying members in young and intermediate age associations, and performs a HARPS-N RV follow-up of young transiting candidates, mainly provided by the NASA-TESS satellite.
I will present some of the highlights of our GAPS-YO program. Among others, the TESS and HARPS-N data of TOI-942 (30-80 Myr), one of the youngest multi-planet systems identified by TESS so far; and the very eccentric warm Jupiter TOI-4515, which will add important hints in the warm Jupiters dual population.
These results, together with more young TOIs (ongoing analyses), will allow us preliminary assessment on the impact of stellar age, as well as photo-evaporation, on the mass/radius relationship.

Ilaria Carleo con una coppia di probabili esopianeti gioviani

Ilaria Carleo, e sullo sfondo una impressione artistica di una coppia di esopianeti giganti. Credits: Ilaria Carleo

Local contact: Alessandro Sozzetti
OATo seminars contact: Paola Re Fiorentin – Roberto Susino