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Planetesimals on eccentric orbits erode rapidly
Lukas Cedenblad, Noemi Schaffer, Anders Johansen +2
We investigate the possibility of erosion of planetesimals in a protoplanetary disk. We use theory and direct numerical simulations (Lattice Boltzmann Method) to calculate the eros…
A close-encounter method for simulating the dynamics of planetesimals
Sebastian Lorek, Anders Johansen
The dynamics of planetesimals plays an important role in planet formation, because their velocity distribution sets the growth rate to larger bodies. When planetesimals form in pro…
The Pencil Code, a modular MPI code for partial differential equations and particles: multipurpose and multiuser-maintained
A. Brandenburg, A. Johansen, P. A. Bourdin +34
The Pencil Code is a highly modular physics-oriented simulation code that can be adapted to a wide range of applications. It is primarily designed to solve partial differential equ…
Transport, destruction and growth of pebbles in the gas envelope of a protoplanet
Anders Johansen, Åke Nordlund
We analyse the size evolution of pebbles accreted into the gaseous envelope of a protoplanet growing in a protoplanetary disc, taking into account collisions driven by the relative…
Capture of satellites during planetary encounters A case study of the Neptunian moons Triton and Nereid
Daohai Li, Anders Johansen, Alexander J. Mustill +2
Single-binary scattering may lead to an exchange where the single object captures a component of the binary, forming a new binary. This has been well studied in encounters between…
The path to instability in compact multi-planetary systems
Antoine C. Petit, Gabriele Pichierri, Melvyn B. Davies +1
The dynamical stability of tightly packed exoplanetary systems remains poorly understood. While for a two-planet system a sharp stability boundary exists, numerical simulations of…