Homogeneous analysis of K2 multi-planet systems hosting Ultra Short Period planets

In this thesis we present an intensive analysis of public transit and radial velocity data.
We used the scientific code pyaneti in order to perform a multi-planet transit and radial velocity
analysis in order to derive planetary masses and radii.
Results: We derived the masses, radii and compositions of the exoplanets transiting the stars
K2-106, K2-141 and HD 3167. Each of these stars hosts an Ultra Short Period (USP) planet
accompanied with at least one outer planetary companion.
Conclusions: This thesis contributes to exoplanet community and increases our knowledge of the
planetary parameters of the systems mentioned. Our characterisation represent an improvement
in comparison with the previously reported in the scientific literature. This results will contribute
to future developments in the study of USP planets.