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12 papers · 2 filters
Observation of aerodynamic instability in the flow of a particle stream in a dilute gas
Holly L. Capelo, Jan Molacek, Michiel Lambrechts +5
Forming macroscopic solid bodies in circumstellar discs requires local dust concentration levels significantly higher than the mean. Interactions of the dust particles with the gas…
How planetary growth outperforms migration
Anders Johansen, Shigeru Ida, Ramon Brasser
Planetary migration is a major challenge for planet formation theories. The speed of Type I migration is proportional to the mass of a protoplanet, while the final decade of growth…
Diffusion and Concentration of Solids in the Dead Zone of a Protoplanetary Disk
Chao-Chin Yang, Mordecai-Mark Mac Low, Anders Johansen
The streaming instability is a promising mechanism to drive the formation of planetesimals in protoplanetary disks. To trigger this process, it has been argued that sedimentation o…
Enhanced constraints on the interior composition and structure of terrestrial exoplanets
Haiyang S. Wang, Fan Liu, Trevor R. Ireland +3
Exoplanet interior modelling usually makes the assumption that the elemental abundances of a planet are identical to those of its host star. Host stellar abundances are good proxie…
Dynamics of multiple protoplanets embedded in gas/pebble disks and its dependence on and parameters
Miroslav Brož, Ondřej Chrenko, David Nesvorný +1
Protoplanets of Super-Earth sizes may get trapped in convergence zones for planetary migration and form gas giants there. These growing planets undergo accretion heating, which tri…
Streaming Instability of Multiple Particle Species in Protoplanetary Disks
Noemi Schaffer, Chao-Chin Yang, Anders Johansen
The radial drift and diffusion of dust particles in protoplanetary disks affect both the opacity and temperature of such disks as well as the location and timing of planetesimal fo…