HD 20329 Radial velocity and activity indices

This type of planets is rare, highly irradiated, and interesting because their formation history is unknown. We aim to obtain precise mass and radius measurements to confirm the planetary nature of a USP candidate found by the Transiting Exoplanet Survey Satellite (TESS).

These parameters can provide insights into the bulk composition of the planet candidate and help to place constraints on its formation history. We used TESS light curves and HARPS-N spectrograph radial velocity measurements to establish the physical properties of the transiting exoplanet candidate found around the star HD 20329 (TOI-4524). We performed a joint fit of the light curves and radial velocity time series to measure the mass, radius, and orbital parameters of the candidate.