Mówca
Opis
In this talk, I will present selected results from radial velocity (RV) follow-up campaigns of small transiting planets (1–4 Earth radii) discovered by Kepler/K2 and TESS. These observations were conducted using the TNG/HARPS-N, ESO/HARPS, CAHA/CARMENES, and VLT/ESPRESSO instruments within the framework of the KESPRINT, THIRSTEE, and CARMENES consortia. Precise RV measurements are essential for determining planetary masses and bulk densities, thereby enabling detailed studies of internal structures, formation, evolution, and potential atmospheric compositions by placing these worlds into mass-radius and mass-density diagrams.
The presented results include two systems with small planets around the Fulton radius valley (LTT 3780 and TOI-406), and four keystone sub-Neptunes located directly within the radius gap (K2-313b, TOI-544b, TOI-521b, and TOI-912b). Furthermore, I will discuss four remarkable multi-planet systems from TESS: the G dwarf TOI-1472 and the K dwarf TOI-1438 (each orbited by two sub-Neptunes), a resonant sextuplet of sub-Neptunes transiting the bright, nearby K0 dwarf HD 110067 (TOI-1835), and the young (~700 Myr), active G5 dwarf TOI-1136, which features six confirmed resonant planets and a seventh single transiting candidate. Finally, I will outline how the data, methodologies, and synergy frameworks established by these ongoing campaigns are actively paving the path for the future radial velocity follow-up of small planets to be discovered by the PLATO mission.