The Solar System: how most planetary systems don't form

Sean Raymond , Bordeaux
Abstract: The past decade of exoplanet observations has confirmed one of humanity's (and all teenagers') worst fears: we are weird. Even though Jupiter is the only Solar System planet likely to be detected with present-day technology, the Solar System is quantifiably unusual among exoplanet systems at the ~1% level. Instead, at least half of main sequence stars host close-in "super-Earths", and ~10% have Jupiters on non-Jupiter-like orbits. In this talk I will explore how the Solar System fits in a larger context by addressing key steps in planetary system formation. I will present models to explain the diversity of observed planetary systems and the mechanisms that create that diversity. While there is as yet no consensus on exactly how the Solar System formed it is clear that Jupiter must have played a decisive role. I will conclude by discussing 'Oumuamua, the newly-discovered interstellar object that directly links our Solar System with another, perhaps less weird, planetary system.
Königstuhl Colloquium
19 Jan 2018, 15:00
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

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