Abstract:  Over the first 100 million years of their lives, planetary systems undergo major changes.  Rocky planetesimals collide.  Atmospheres are accreted and lost.  Dynamical interactions shape and tilt planetary orbits.  I'll begin with a summary of ongoing observational efforts aimed at finding young transiting exoplanets that are undergoing these changes.  I will then motivate and discuss two specific questions.  First: how do close-in Neptunian mass planets evolve over the first gigayear of their lives?  Second: when do hot Jupiters arrive on their tiny orbits?  I'll make the case for how current observational results are helping to address the first question.  The youngest hot Jupiters however seem conspicuously absent, though a few objects may fit the bill.  In the coming years, discoveries to be made by mining public datasets will likely to remedy this gap, and help improve our understanding of how the observed population of transiting exoplanets came to exist.

Host:  Dan Stevens

Please click the link to join the webinar: https://psu.zoom.us/j/96060188956