Computational Astrophysics Group at Leiden Observatory & AMUSE Lucie Jílková 2nd annual CHARM meeting, January 30, 2014, Ghent CASTLE Computational ASTrophysics LEiden head of the group Simon Portegies Zwart postdocs Arjen van Elteren, Lucie Jílková, Inti Pelupessy, Silvia Toonen, Nathan de Vries + Niels Drost (eScience center, Amsterdam), Nora Lützgendorf (ESA, ESTEC Noordwijk) PhD students Jeroen Bédorf, Tjarda Boekholt, Dan Caputo, Guilherme Ferrari, Adrian Hamers, Edwin van der Helm, Carmen Martinez Barbosa, Alex Rimoldi + Tjibaria Pijloo, Thomas Wijnen (Radboud University Nijmegen) + MSc students + computers 20 people + computers I codes for computational astrophysics I astrophysical software development I research applications CASTLE Computational ASTrophysics LEiden abstracts of ~20 refereed papers, 2011 – Jan 2014 www.wordle.net CASTLE Computational ASTrophysics LEiden abstracts of ~20 refereed papers, 2011 – Jan 2014 www.wordle.net AMUSE Astrophysical MUltipurpose Software Environment I uniform framework to existing codes I user scripts — python I unit handling I coupling (input–output, serial, hierarchical, interaction) I distributed computing I independent community codes for various physical domains I flexibility and support (tutorials, examples, active team, growing user community) I references — Portegies Zwart et al. (2013), Pelupessy et al. (2013) www.amusecode.org AMUSE community codes code Hermite0 PhiGRAPE ph4 BHTree Octgrav Bonsai Twobody Huayno SmallN Mercury Mikkola MI6 Pikachu Brutus HiGPUs Tupan MMC SSE Evtwin MESA BSE SeBa Fi Gadget-2 Capreole Athena3D MPIAMRVAC Simplex SPHRAY Mocassin MMAMS Hop FractalCluster Halogen GalactICS language C++ Fortran, MPI/GPU C++, MPI/GPU C++ C++, CUDA C++, CUDA Python C, OpenMP/OpenCL C++ Fortran Fortran C++, MPI/GPU C++, CUDA C++, MPI C++, CUDA Python, OpenCL Fortran Fortran Fortran Fortran, OpenMP Fortran C++ Fortran, OpenMP C, MPI Fortran, MPI C, MPI Fortran, MPI C++, MPI Fortran Fortran C++ C++ Fortran C C short description Hermite N-body Hermite N-body Hermite N-body Barnes-Hut treecode Barnes-Hut treecode Barnes-Hut treecode Kepler solver Hamiltonian splitting regularized solver symplectic planetary integrator relativistic regularization Hermite with Post-Newtonian terms Hybrid Barnes-Hut/Hermite arbitrary precision Bulirsch-Stoer Hermite N-body Symplectic N-body, Post-Newtonian Monte-Carlo gravitational dynamics stellar evolution fits Henyey stellar evolution Henyey stellar evolution binary evolution stellar and binary evolution TreeSPH TreeSPH Finite volume grid hydrodynamics Finite volume grid hydrodynamics AMR code for conservation laws Rad. transport on Delaunay grid Monte Carlo on SPH particles Monte Carlo, steady state stellar mergers by entropy sorting particle group finder Fractal cluster generator Halo distribution functions Galaxy model generator main reference Hut et al. (1995) Harfst et al. (2007) McMillan, in prep. Barnes & Hut (1986) Gaburov et al. (2010) Bédorf et al. (2012) Bate et al. (1971) Pelupessy et al. (2012) Portegies Zwart et al. (1999) Chambers (1999) Mikkola & Merrit (2008) Iwasawa et al. (2011) Iwasawa et al., in prep. Boekholt & Portegies Zwart, in prep. apuzzo-Dolcetta et al. (2013) Ferrari, in prep. Giersz (2006) Hurley et al. (2000) Glebbeek et al. (2008) Paxton et al. (2011) Hurley et al. (2000) Portegies Zwart et al. (2001) Pelupessy (2005) Springel (2005) Mellema et al. (1991) Stone et al. (2008) Keppens et al. (2011) Paardekooper et al. (2010) Altay et al. (2008) Ercolano et al. (2003) Gaburov et al. (2008) Eisenstein & Hut (1998) Goodwin & Whitworth (2004) Zemp et al. (2008) Widrow et al. (2008) Pelupessy et al. (2013) AMUSE examples evolution of stars and gas in embedded cluster — gravitational dynamics + gas hydrodynamics + stellar evolution — Pelupessy & Portegies Zwart (2012) evolve star_to_sph.py check v kicks evolve v kicks sink v kicks evolve v kicks sink base grid type: "fcc" core mass: ~1/3 M* (R*<Rroche) v kicks 0.4 evolve v kicks adjust x, v .4 0.2 .2 0.0 .0 0.2 0.2 .5 0.4 .4 .0 Temperature Density 0 50 radius [ R⊙] .0 100 triple with Roche lobe overflow — stellar evolution + gas hydrodynamics + gravitational dynamics — de Vries et al. (2014) AMUSE examples — work in progress Roche lobe overflow of high-mass star on BH — E. van der Helm stars with wind around BH — N. Lützgendorf Bondi–Hoyle accretion — T. Wijnen binary star-formation (Boss & Bodenheimer, 1979) — L. Jílková references I www.amusecode.org I Pelupessy & Portegies Zwart, MNRAS 429, p895, 2012 I Pelupessy et al., A&A 557, p84, 2013 I Portegies Zwart et al., CoPhC 184, p456, 2013 I de Vries et al., MNRAS, 2014
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