NEMO - An Extendible Stellar Dynamics Toolbox.

This page is special shortened ADASS-IV poster version, the full page can be retrieved on URL http://www.astro.umd.edu/nemo .

What is NEMO?

NEMO is an extendible Stellar Dynamics Toolbox. It has various programs to create, integrate, analyze and visualize N-body like systems. In addition there are various tools to operate on images, tables and orbits, including FITS files to export/import to/from other astronomical data reduction packages. We also advertise other software packages , which try and solve similar problems.

Documentation

The Users and Programmers Guide is an extensive (150 pages) manual. It's four major parts give a general introduction, a cookbook with many examples, a programmers guide and an appendix with many reference sections.
The Survival Guide is intended for the casual usual, who is familiar with operating packages within UNIX.
A summary of features.
A Tutorial for the eager users who want to see what you can do, and try out features. ( under construction )
A set of UNIX manual pages, that acts as online reference guide, which make X-windows browsers such as xman and tkman very useful tools:
- programs (1NEMO) (of which index(1NEMO), lists NEMO perograms alphabetically).
- subroutines (3NEMO) . (of which index(3NEMO), lists all NEMO subroutines alphabetically).
- file formats (5NEMO) .
- administrativia (8NEMO) (of which programs(8NEMO), lists all NEMO programs thematically).
- local programs (lNEMO) .
- whatis manual database.

References

On Toolboxes and Telescopes , by Hut and Sussman, (1986) in: The Use of Supercomputers in Stellar Dynamics, Springer Verlag, p 193-198.
An Environment for Experiments in Stellar Dynamics , by: Barnes, Hernquist, Hut and Teuben (1988) BAAS, 20, 706.
A Laboratory for Gravitational Scattering Experiments by Hut, in: IAU colloq 109, pp. yyy.
NEMO: A Stellar Dynamics Toolbox , by Teuben (1994, PASJ, xxx, yyy) overviews the current state of NEMO and introduces a proposal to use FITS as a vehicle to interchange and archive NBODY data (see also the QUESTIONNAIRE ). A gzip compressed postscript version of this paper is also available. The Sci.Data.Formats FAQ discussion may be relevant. The example program mentioned in PASJ94 writes an NBODY BINTABLE .

Installation

A bootstrap loader from our anonymous ftp . This small C-shell script , that you can save ( Save As... in Mosaic) anywhere on your local disk, and execute to bootstrap NEMO. For example,
- chmod +x bootstrap
- bootstrap nemo=/usr/nemo
will pick up the tar file from Maryland, and install a bootstrap version of NEMO, including a few small programs, in a directory called /usr/nemo and below.
A tar file, that contains the latest ( ) release.
NEMO nbody fits proposal (This is now an outdated version, please refer to the 1994 PASJ paper

Difficulties during installation are most likely resolved by consulting Appendix G in the (rather large) manual , and checking last minute changes that are discussed in the $NEMO/README file.

Other N-body Related Software

TIPSY , an interactive X-windows based display package maintained by Neal Katz and Tom Quinn. Their HPCC project also maintains a software archive. In some NEMO versions you may find a TIPSY copy in $NEMO/usr/tipsy (differences from the official release can be found in our anonymous ftp ).
STARLAB ; Piet Hut, Steve McMillan and Jun Makino; you may find a copy in $NEMO/usr/starlab .
Nora , an interactive PGPLOT based analysis and display package built by Marc Balcells ( University of Groningen ). Is not publically available yet.
An anonymous ftp directory tree maintained by Josh Barnes. A WWW server is expected some time soon.
The Laboratory for Computational Astrophysics (LCA) maintains an archive of their codes and documentation .
The Grand Challenge Cosmology Consortium (GC3) figures out the origin of large scale structure in the universe.
Tomasz Plewa's (Warsaw University Observatory) Smooth Particle Hydrodynamics list, part of the CFD codes list document, which is regularly posted to the sci.physics.computational.fluid-dynamics newsgroup .
Animations (you probably need to have mpeg_play in your command search path) and other pretty pictures:
- A sample movie by Chris Mihos and Lars Hernquist show an encounter between two equal mass galaxy disks.
- The Indiana University Astronomy Department also has some animations containing N-body simulations.
- The Cosmic Explorer has various animations on cosmological simulations from the UIUC group.
- The LCA Cosmology simulations.
- A sample of GC3 Cosmology simulations. Some overlap with the previous item.

teuben@astro.umd.edu