ACS 1.3.3 is released.
ACS 1.3.3 presents time symmetric block time step Hermite codes
up to and including an eight-order implementation, in volume 25
of the development series.
For instructions to install the computer codes on your own computer, see the
README page.
2007, July 29
ACS 1.3.2 is released.
ACS 1.3.2 presents a time symmetric block time step code with fourth order
and sixth order Hermite implementations, in volume 25 of the development
series.
For instructions to install the computer codes on your own computer, see the
README page.
2007, March 30
ACS 1.3.1 is released.
ACS 1.3.1 presents an improved version of our introductory volume
Moving Stars Around,
in which the Ruby codes can now be found by clicking on the file names,
in the html version of the book.
For instructions to install the computer codes on your own computer, see the
README page.
2006, November 27
ACS 1.3 is released.
ACS 1.3 presents the new version of our introductory volume
Moving Stars Around,
which is now completed.
For instructions to install the computer codes on your own computer, see the
README page.
2006, August 30
ACS 1.2.5 is released.
ACS 1.2.5 presents only minor changes with respect to the previous
version. The new version of our introductory volume
Moving Stars Around
is in better shape now, with the first 15 chapters now close to their
final form.
For instructions to install the computer codes on your own computer, see the
README page.
2006, August 11
ACS 1.2.4 is released.
ACS 1.2.4 presents only minor changes with respect to the previous
version. The main addition is the first part of the new version of
our introductory volume
Moving Stars Around. We
have also added a section of
Links to Literature and Related Projects
to our home page.
For instructions to install the computer codes on your own computer, see the
README page.
2006, July 30 - August 11
A two-week long N-Body Summer School
will be held at the Institute of Astronomy in Cambridge, UK. Topics
will include computational techniques and stellar evolution processes
including mass loss and collisions, as well as special treatments for
compact subsystems.
2006, July 23 - August 5
A two-week long International
School on Galactic and Cosmological N-Body Simulations will be
held at Tonantzintla, Puebla in Mexico. Topics will include the
modeling of galactic and cosmological phenomena, and a detailed
discussion of state-of-the-art tools, such as fast tree codes.
ACS 1.2.3 is released.
ACS 1.2.3 presents only minor changes with respect to the previous
version. The main addition is our new
time-symmetrized
individual-block-time-step code. As far as we know, this is the
first code that succeeds to apply froward-backward time symmetry to an
individual time step code with block time steps, i.e. with time step
sizes only allowed to be different from each other by integer powers of two.
For instructions to install the computer codes on your own computer, see the
README page.
2006, February 11
A new N-body Simulations
bulletin board was created by Cary Walker, with assistance of
Jason Underdown. The discussions will use the ACS material provided
here as the inspiration for the list and as reference material, but
the bulletin board will be managed independently.
2006, January 14
ACS 1.2.2 is released.
ACS 1.2.2 presents a new lay-out of the ACS home page,
which reflects our latest thoughts about the structure
and evolution of our ongoing projects of development of
simulation code and documentation.
The Maya Project is the new name for
what we used to call the Kali project. Maya is now the name
for the software environment within which we will run the Kali code,
which will be our flagship integrator for simulating dense stellar systems.
While Maya will denote our virtual laboratory, Kali will
be our main laboratory tool.
We have started to rewrite our very first volume,
Moving Stars Around,
to bring it in line with the Maya project. Specifically, we will use
a much more flexible plotting package, we will introduce a visualization
tool, and all codes will be written in Ruby.
In addition, a large number of small corrections have been made.
For instructions to install the computer codes on your own computer, see the
README page.
2005, April 13
ACS 1.2 is released.
A novel feature of ACS 1.2 is the presentation of an N-body code that
allows individual particles to use not only individual time steps, but
also individual integration algorithms, from a wide range of choices
including ... (more)
For instructions to install the computer codes on your own computer, see the
README page.
ACS home page is now translated into several other languages
If you are interested in helping us to translate more pages in other
languages, please send an email to "piet ATSIGN ias.edu".
several new volumes, including roughly 500 pages of new text
a dialogue between two researchers, rather than between the three
students as was the case in Moving Stars Around
a switch from C++ to Ruby
a clear plan for extending the current material to construct a new
simulation code for dense stellar systems, the Kali code, in the
course of the next several years.
