Planet migration in the era of JWST and Ariel

Understanding the diverse formation and migration pathways that shape exoplanetary systems requires characterizing both their atmospheric properties and their orbital dynamics. A key dynamical diagnostic is the projected spin-orbit angle, the alignment between the stellar spin and the planetary orbit which provides crucial tests for theoretical models. This angle can be determined using the Rossiter-McLaughlin effect. Although measurements exist for over 200 planets, the overall distribution of these angles remains incompletely understood, motivating further observations across the full parameter space. In this talk, we present measurements of spin-orbit angles for 25 systems identifying several system that have likely underwent disc-free migration. We highlight the synergy between the two approaches and comment on the current overlap between targets with spin-orbit angle measurements and those having measurements for atmospheric characterization. While we find no strong observational biases due to the spin-orbit angle, we note that the majority of planets, especially sub-Neptunes, with atmospheric data still lack spin-orbit measurements. This incompleteness of the dynamical information may limit the interpretation of upcoming atmospheric surveys.