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Mapping CO Gas in the GG Tauri A Triple System with 50 AU Spatial Resolution
Ya-Wen Tang, Anne Dutrey, Stephane Guilloteau +11
We aim to unveil the observational imprint of physical mechanisms that govern planetary formation in the young, multiple system GG Tau A. We present ALMA observations of CO…
Fast migration of low-mass planets in radiative discs
Arnaud Pierens
Low-mass planets are known to undergo Type I migration and this process must have played a key role during the evolution of planetary systems. Analytical formulae for the disc torq…
Accretion of Uranus and Neptune from inward-migrating planetary embryos blocked by Jupiter and Saturn
Andre Izidoro, Alessandro Morbidelli, Sean N. Raymond +2
Reproducing Uranus and Neptune remains a challenge for simulations of solar system formation. The ice giants' peculiar obliquities suggest that they both suffered giant collisions…
Gas giant planets as dynamical barriers to inward-migrating super-Earths
Andre Izidoro, Sean N. Raymond, Alessandro Morbidelli +2
Planets of 1-4 times Earth's size on orbits shorter than 100 days exist around 30-50% of all Sun-like stars. In fact, the Solar System is particularly outstanding in its lack of "h…