Sverre Aarseth's research into numerical simulations of many-body (N-body) gravitational interactions spans over 40 years and is reported in several publications and his book. Sverre has developed a set of FORTRAN codes which describe the dynamics very closely, and these are regarded by many as the de facto standard.
Sverre Aarseth's codes are available freely for download from the N-Body directory at ftp://ftp.ast.cam.ac.uk/pub/sverre/. Your browser should present you with an FTP viewer window when you click on this link and you should be able to copy whole code group directories at a time.
Use the links below to identify and download the specific files that you need.
At any time if you would like further information, please contact Sverre Aarseth.
|Code Group||Filename||Filesize (Kb)||Notes|
|CODES||2||General textual description of the codes.|
The version nbody1.tar.Z is in full REAL*8.
The file nbody1_real4.tar.Z is the old version with mixed REAL*4/*8 precision which is kept for historical reasons.
The recent file nbody1h.tar.gz is the Hermite block-step formulation for workstations and (micro-)GRAPE, developed with Jun Makino in 1991.
Directory nbody2 contains the code NBODY2 and an article describing it. The whole file is called nbody2.tar.Z. Inside is the code, the article chap9.tex and also chap9.ps. The article may be produced in TeX using the enclosed macro
svnyp.sty (or see New Ast. 6, 277). The code NBODY2H is the Hermite block-step version of NBODY2.
|nbody3||nbody3.tar.Z||204||One force polynomial with full regularization.|
The public GRAPE-6 or micro-Grape code NBODY4
and the equivalent brute force code for workstations or laptops
The current versions were updated 12 March 2006.
Introduction to running simulations.
The code NBODY5 has been heavily used but
is no longer updated. NBODY6 is recommended instead.
README contains some past history of NBODY6.
Tar file for the GPU directory and library.
pdf file of new NBODY6-GPU paper.
PLANET is a Hermite code for planetesimals.
PLANET3 is a planetary code with fragmentation.
Basic version of three-body regularization.
TRIPLE movie code with X11 graphics.
Basic chain version. CHAIN2 includes the slow-down
procedure (Cel. Mech. 64, 197).
Other versions are available upon request.
movie.tar.Z holds X11 movie version of CHAIN.
|comove||comove.tar.Z||28||Cosmological N-body code in comoving coordinates.|
The file "errata" is a text file for book errata of 3/10/03
and "errata.ps" is the corresponding postscript file.
The text file "errata2" contains subsequent mistakes.
HERMIT is a basic Hermite N-body code.
HERMIT2 uses time-symmetric Hermite method of Kokubo et al.
HERMIT4 is time-symmetric Hermite with Burdet-Heggie regularization.
The manual is described in the postscript file hermit4.ps.
Toy codes for unperturbed two-body motion.
Five different regularization methods are implemented.
A new version called hermit.tar.Z includes Post-Newtonian
perturbations derived from the 2005 paper of Mora and Will.
triple.tar.Z holds the three-body regularization code described in the manual.
|talks||talks.tar.gz||600||N-body talks Nov 2006.|
|nbody0||nbody0.f||1||Compact fourth-order Hermite block-step code.|