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Dynamical evidence for an early giant planet instability
Rafael Ribeiro de Sousa, Alessandro Morbidelli, Sean N. Raymond +3
The dynamical structure of the Solar System can be explained by a period of orbital instability experienced by the giant planets. While a late instability was originally proposed t…
Formation of compact systems of super-Earths via dynamical instabilities and giant impacts
Sanson T. S. Poon, Richard P. Nelson, Seth A. Jacobson +1
NASA's Kepler mission discovered planets in multi-planet systems containing 3 or more transiting bodies, many of which are super-Earths and mini-Neptunes in compact confi…
Characterization of the Nucleus, Morphology and Activity of Interstellar Comet 2I/Borisov by Optical and Near-Infrared GROWTH, Apache Point, IRTF, ZTF and Keck Observations
Bryce T. Bolin, Carey M. Lisse, Mansi M. Kasliwal +52
We present visible and near-infrared photometric and spectroscopic observations of interstellar object 2I/Borisov taken from 2019 September 10 to 2019 November 29 using the GROWTH,…
Geoscience for understanding habitability in the solar system and beyond
Veronique Dehant, Vinciane Debaille, Vera Dobos +15
This paper reviews habitability conditions for a terrestrial planet from the point of view of geosciences. It addresses how interactions between the interior of a planet or a moon…
Quasi-static contraction during runaway gas accretion onto giant planets
Michiel Lambrechts, Elena Lega, Richard P. Nelson +2
Gas-giant planets, like Jupiter and Saturn, acquire massive gaseous envelopes during the approximately 3 Myr-long lifetimes of protoplanetary discs. In the core accretion scenario,…
The meteorite flux of the last 2 Myr recorded in the Atacama desert
A. Drouard, J. Gattacceca, A. Hutzler +11
The evolution of the meteorite flux to the Earth can be studied by determining the terrestrial ages of meteorite collected in hot deserts. We have measured the terrestrial ages of…
Kuiper belt: formation and evolution
Alessandro Morbidelli, David Nesvorny
This chapter reviews accretion models for Kuiper belt objects (KBOs), discussing in particular the compatibility of the observed properties of the KBO population with the streaming…
The role of dissipative evolution for three-planet, near-resonant extrasolar systems
Gabriele Pichierri, Konstantin Batygin, Alessandro Morbidelli
Early dynamical evolution of close-in planetary systems is shaped by an intricate combination of planetary gravitational interactions, orbital migration, and dissipative effects. W…
Formation of planetary systems by pebble accretion and migration: Growth of gas giants
Bertram Bitsch, André Izidoro, Anders Johansen +4
Giant planets migrate though the protoplanetary disc as they grow. We investigate how the formation of planetary systems depends on the radial flux of pebbles through the protoplan…
Formation of planetary systems by pebble accretion and migration: How the radial pebble flux determines a terrestrial-planet or super-Earth growth mode
Michiel Lambrechts, Alessandro Morbidelli, Seth A. Jacobson +4
Super-Earths are found in tighter orbits than the Earth's around more than one third of main sequence stars. It has been proposed that super-Earths are scaled-up terrestrial planet…
An ancient and a primordial collisional family as the main sources of X-type asteroids of the inner Main Belt
Marco Delbo, Chrysa Avdellidou, Alessandro Morbidelli
The near-Earth asteroid population suggests the existence of an inner Main Belt source of asteroids that belongs to the spectroscopic X-complex and has moderate albedos. The identi…
Formation of planetary systems by pebble accretion and migration: Hot super-Earth systems from breaking compact resonant chains
André Izidoro, Bertram Bitsch, Sean N. Raymond +4
At least 30\% of main sequence stars host planets with sizes of between 1 and 4 Earth radii and orbital periods of less than 100 days. We use N-body simulations including a model f…