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Titolo: GADGET: a code for collisionless and gasdynamical cosmological simulations
Autore: Springel, V; Yoshida, N; White, SDM;
- Indirizzi:
- Max Planck Inst Astrophys, D-85740 Munich, Germany Max Planck Inst Astrophys Munich Germany D-85740 D-85740 Munich, Germany Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA Harvard Smithsonian Ctr Astrophys Cambridge MA USA 02138 ge, MA 02138 USA
- Titolo Testata:
- NEW ASTRONOMY
fascicolo: 2,
volume: 6,
anno: 2001,
pagine: 79 - 117
- SICI:
- 1384-1092(20010328)6:2<79:GACFCA>2.0.ZU;2-J
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- SMOOTHED PARTICLE HYDRODYNAMICS; N-BODY SIMULATIONS; SPECIAL-PURPOSE COMPUTER; DARK-MATTER HALOS; TREE-CODE; GALAXY FORMATION; PARALLEL COMPUTER; GRAVITY SOLVER; ERROR ANALYSIS; TIDAL TAILS;
- Keywords:
- methods : numerical; galaxies : interactions; dark matter;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 98
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Springel, V Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85740 Munich, Germany Max Planck Inst Astrophys Karl Schwarzschild Str 1 Munich Germany D-85740
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- Citazione:
- V. Springel et al., "GADGET: a code for collisionless and gasdynamical cosmological simulations", NEW ASTRON, 6(2), 2001, pp. 79-117
Abstract
We describe the newly written code GADGET which is suitable both for cosmological simulations of structure formation and for the simulation of interacting galaxies. GADGET evolves self-gravitating collisionless fluids with the traditional N-body approach, and a collisional gas by smoothed particle hydrodynamics. Along with the serial version of the code, we discuss a parallel version that has been designed to run on massively parallel supercomputers with distributed memory. While both versions use a tree algorithm to compute gravitational forces, the serial version of GADGET can optionally employ the special-purpose hardware GRAPE instead of the tree. Periodic boundary conditions are supported by means of an Ewald summation technique. The code uses individual and adaptive timesteps for all particles, and it combines this with a scheme for dynamic tree updates. Due to its Lagrangian nature, GADGET thus allows a very large dynamic range to be bridged, both in space and time. So far, GADGET has been successfully used to run simulations with up to 7.5 x 10(7) particles, including cosmological studies of large-scale structure formation, high-resolution simulations of the formation of clusters of galaxies, as well as workstation-sized problems of interacting galaxies. In this study, we detail the numerical algorithms employed, and show various tests of the code. We publicly release both the serial and the massively parallel version of the code. (C) 2001 Elsevier Science B.V. All rights reserved.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/06/13 alle ore 00:38:43