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lagrange_radii - find the Lagrange radii of a stellar system
requires NEMO version 3.0.13 or higher, see http://www.astro.umd.edu/nemo.
lagrange_radii finds the radii of spheres centred at the origin
x=(0,0,0) that contain a given fraction of the total mass. The code is significantly
faster than a full sort of all body radii.
lagrange_radii may be used to
create a stopfile to trigger the stopping of a running N-body simulations
that is being analysed by lagrange_radii.
Useful for isolated stellar systems only.
- Input snapshots
are read from file, which must be in NEMO snapshot format. If file=-, input
is expected from stdin, useful for piping data from another program. Default:
- The lagrange radii are computed for every fractional
mass contained in the comma separated list (up to 100). Default: 0.01,0.03,0.1,0.3,0.5,0.7,0.9,0.97,0.99
- times=time range(s)
- Range(s) of simulation times, for which snapshots shall
be processed. Default: all.
- If given, snapshots are written in NEMO
snapshot format to file with same body data as the input, unless give specifies
otherwise. No default.
- If given, only body data indicated by
IOstring (and present in the input) are written out with the snapshot output.
- If snapshots are written out, the outputs are made
every val simulation time units. If val=0, every snapshot processed is
written out. Default: 0.
- A table of the simulation time and
Lagrange radii (in the order the fractional masses are given) is written
to file, appending an existing file, if applicable. If not given, Lagrange
radii are written to stdout. No default.
- If given, the a stopfile
will be created, IF the condition defined with the next options is satisfied.
See also gyrfalcON(1falcON)
. No default.
- If stopfile is given,
R_stop is the numth Lagrange radius. Default: 0.
- If val>0, the
stop condition is R_stop < val.
If val<0, the stop condition is R_stop >
- If true, use R_stop/R_stop(t_initial) instead
of R_stop in the stop condition. Default: f.
- If given, do not
stop before simulation time val. No default.
- Create the stopfile
val simulation time units after the stop condition was first satisfied.
falcON/doc/user_guide.pdf User Guide for falcON
Walter Dehnen firstname.lastname@example.org
update history of this man page
18-May-2004 first version of manual WD
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