5 papers
Solar carbon abundance from 3D non-LTE modelling of the diagnostic lines of the CH molecule
Richard Hoppe, Maria Bergemann, Philipp Eitner +5
The spectral lines of the CH molecule are a key carbon (C) abundance diagnostic in FGKM-type stars. These lines are detectable in metal-rich and, in contrast to atomic C lines, als…
GPU accelerated MHD in the DISPATCH framework using directive-based programming
Michael Haahr, Troels Haugbølle, à ke Nordlund +2
We present a GPU-accelerated implementation of a magnetohydrodynamic (MHD) solver using directive-based programming with OpenMP target offloading. The solver is integrated into the…
Abundance Effects from Protoplanetary Disk Outflows
à ke Nordlund
Systematic abundance differences that depend on the condensation temperatures of elements have been observed, in particular for stars similar to the Sun; solar twins and solar anal…
Origin and Evolution of Angular Momentum of Class II Disks
Veli-Matti Pelkonen, Paolo Padoan, Mika Juvela +2
Context: While class II pre-main-sequence (PMS) stars have already accreted most of their mass, the continued inflow of fresh material via Bondi-Hoyle accretion acts as an addition…
Thousands of planetesimals: Simulating the streaming Instability in very large computational domains
Urs Schäfer, Anders Johansen, Troels Haugbølle +1
The streaming instability is a mechanism whereby pebble-sized particles in protoplanetary discs spontaneously come together in dense filaments, which collapse gravitationally to fo…