Zooming in on star and protoplanetary disk formation
AlbaNova and Nordita Colloquium
Thursday 12 March 2015
Åke Nordlund (Niels Bohr Insititute and Centre for Star and Planet Formation, University of Copenhagen)
Adaptive mesh refinement (AMR) simulations with the RAMSES code allow us to zoom in to sub-AU scales from Giant Molecular Cloud (GMC) outer scales (~ 40pc). With grid sizes down to ~100 AU (16 levels of factor 2 refinement) we can follow supernova driving of star formation over Myr time scales. With 22 level of refinement we can follow the accretion history of individual stars over ~100 kyr with grid sizes down to ~2 AU, and with 29 levels of refinement we can study the dynamics of accretion disks with jets and disk winds over time scales ~100 yr, with grid sizes down to ~0.015 AU. We are currently implementing AMR radiative energy transfer and non-equilibrium chemistry with dust in the RAMSES code, and also developing a new moving-mesh AMR code (DISPATCH), intended for the near future era of exa-scale computing.