GADGET swMATH ID: 12701 Software Authors: Springel, V.; Yoshida, N.; White, S. D. M. Description: GADGET: a code for collisionless and gasdynamical cosmological simulations. 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 7.5×107 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. Homepage: http://www.mpa-garching.mpg.de/gadget/ Related Software: RAMSES; CLASS; TREESPH; CAMB; CUDA; DualSPHysics; AQUAgpusph; PKDGRAV3; Python; PHANTOM; Splash; PySPH; gevolution; ECOSMOG; PPM; ENZO; CONCEPT; CosmoMC; 2HOT; SciPy Cited in: 70 Documents all top 5 Cited by 222 Authors 5 Hannestad, Steen 5 Tram, Thomas 4 Brandbyge, Jacob 4 Springel, Volker 3 Dakin, Jeppe 3 Hu, Xiangyu Y. 3 Schmidt, Fabian 2 Abel, Tom 2 Colombi, Stéphane 2 Crittenden, Robert G. 2 Dolag, Klaus 2 Enßlin, Torsten A. 2 Fidler, Christian 2 Gao, Liang 2 Jubelgas, M. 2 Koyama, Kazuya 2 Li, Baojiu 2 Liu, Chao 2 Oliynyk, Todd Andrew 2 Pfrommer, C. 2 Puri, Kunal 2 Ramachandran, Prabhu 2 Rampf, Cornelius 2 Stadel, Joachim 2 Wands, David 2 Zhang, Chi 1 Adamek, Julian 1 Adams, Nikolaus A. 1 Adhikari, Susmita 1 Agarwal, Arpit 1 Agertz, Oscar 1 Arnold, Christian 1 Barreira, Alexandre 1 Bartelmann, Matthias 1 Baugh, Carlton M. 1 Bazilevs, Yuri 1 Bédorf, Jeroen 1 Bergdorf, Michael 1 Bernardeau, Francis 1 Bhattacharya, Aparna 1 Bhosale, Aditya 1 Biagetti, Matteo 1 Bilotta, Giuseppe 1 Biros, George 1 Boffin, Henri M. J. 1 Børve, Steinar 1 Cabass, Giovanni 1 Canelas, R. B. 1 Chen, Joe Zhiyu 1 Chen, Wei 1 Choquette, Jeremie 1 Choudhury, Tirthankar Roy 1 Cieplak, Agnieszka M. 1 Cline, James M. 1 Cornell, Jonathan M. 1 Coughlin, Jared 1 Crespo, Alejandro J. C. 1 Croker, K. A. S. 1 Cui, Tao 1 Dalal, Neal 1 Daverio, David 1 de Mattia, Arnaud 1 Deriaz, Erwan 1 Desjacques, Vincent 1 Di G. Sigalotti, Leonardo 1 Dinesh, A. 1 Dizgah, Azadeh Moradinezhad 1 Domínguez, José Manuel 1 Durrer, Ruth 1 Dutt, Arkopal 1 Eckmann, Jean-Pierre 1 Fair, Rebecca 1 Fan, Sijiang 1 Fan, Xiaokang 1 Feng, Yu 1 Frenk, Carlos S. 1 Frontiere, Nicholas 1 Fu, Lin 1 Gaburov, Evghenii 1 García-Feal, O. 1 Gassner, Gregor J. 1 Gawryszczak, Artur 1 Gaztañaga, E. 1 Gomez-Gesteira, Moncho 1 Gong, Zhaoxin 1 Gonnet, Pedro 1 Govind, Rahul 1 Guo, Xiaohu 1 Guo, Xiaowei 1 Hassani, Farbod 1 Haugbølle, Troels 1 Hayes, John C. 1 He, Siyu 1 Helmi, Amina 1 Hernández-Aguayo, César 1 Hieber, Simone E. 1 Ho, Shirley 1 Jain, Bhuvnesh 1 Jasche, Jens 1 Jenkins, Adrian ...and 122 more Authors all top 5 Cited in 22 Serials 22 Journal of Cosmology and Astroparticle Physics 20 Journal of Computational Physics 3 Astronomy and Astrophysics 3 Computer Physics Communications 2 Computer Methods in Applied Mechanics and Engineering 2 ACM Transactions on Mathematical Software 2 Engineering Analysis with Boundary Elements 1 Computers and Fluids 1 Communications in Mathematical Physics 1 General Relativity and Gravitation 1 Monthly Notices of the Royal Astronomical Society 1 Physics Reports 1 Journal of Computational and Applied Mathematics 1 Proceedings of the National Academy of Sciences of the United States of America 1 Celestial Mechanics and Dynamical Astronomy 1 SIAM Journal on Scientific Computing 1 European Journal of Mechanics. 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