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Debris Disc Constraints on Planetesimal Formation
Alexander V. Krivov, Aljoscha Ide, Torsten Löhne +2
Two basic routes for planetesimal formation have been proposed over the last few decades. One is a classical "slow-growth" scenario. Another one is particle concentration models, i…
Evidence for the formation of comet 67P/Churyumov-Gerasimenko through gravitational collapse of a bound clump of pebbles
Jürgen Blum, Bastian Gundlach, Maya Krause +19
The processes that led to the formation of the planetary bodies in the Solar System are still not fully understood. Using the results obtained with the comprehensive suite of instr…
Circularizing Planet Nine through dynamical friction with an extended, cold planetesimal belt
Linn E. J. Eriksson, Alexander J. Mustill, Anders Johansen
Unexpected clustering in the orbital elements of minor bodies beyond the Kuiper belt has led to speculations that our solar system actually hosts nine planets, the eight establishe…
Harvesting the decay energy of Al to drive lightning discharge in protoplanetary discs
Anders Johansen, Satoshi Okuzumi
Chondrules in primitive meteorites likely formed by recrystallisation of dust aggregates that were flash-heated to nearly complete melting. Chondrules may represent the building bl…
The dynamical evolution of transiting planetary systems including a realistic collision prescription
Alexander J Mustill, Melvyn B Davies, Anders Johansen
Planet-planet collisions are a common outcome of instability in systems of transiting planets close to the star, as well as occurring during in-situ formation of such planets from…
Radially resolved simulations of collapsing pebble clouds in protoplanetary discs
Karl Wahlberg Jansson, Anders Johansen
We study the collapse of pebble clouds with a statistical model to find the internal structure of comet-sized planetesimals. Pebble-pebble collisions occur during the collapse and…