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orbname - Orbit classification and plotting
orbname attempts to classify an orbit. Currently
only orbits in non-rotating triaxial potentials are handled properly. It
can distinguish between Box, (long axis) X-Tube, Y-Tube, and (short axis)
Z-Tube orbits, based on the predominant angular momentum axis (J_i, i=X,Y,Z).
This program cannot distinguish between the so-called inner- and outer-X-Tube
orbits. Anything else is labeled as Unknown.
Note that orbits with very long
or short periods cannot be reliably classified, either because they have
simply not been tracked long enough, or because they may be scattered from
one orbital family to another.
orbname will, for each dimension (X,Y,Z),
tabulate the number of angular momentum flips and velocity flips, tau (the
ratio of mean to dispersion of the angular momentum), nu (the ratio of
half the sum of min and max to dispersion), the minimum and maximum angular
momentum, and their mean and dispersion.
The ratios tau and nu (under
control of the user, see taumin= and numin= below) are used to classify
an orbit has having a significant amount of angular moment along an axis.
In addition, if an axis has no flips in angular momentum, it is also counted
has having angular moment along that axis. This gives a total of three methods
to classify orbits. There are output under the names F_Category (J-flipping),
T_Category (tau) and N_Category (nu)
The following parameters
are recognized in any order if the keyword is also given:
Has some problems with planar orbits and
bi-axial potentials (such as oblate, prolate and spherical).
orbit(s), in standard orbit(5NEMO)
- Minimum mean/sigma
J_i needed to count as significant angular momentum. [Default: 1].
- Minimum ratio of half the sum of min and max to their sigma J_i needed
to count as significant angular momentum. [Default: 1].
- Logical to
denote if a 6 panels with evolution of angular momentum and (XY,YZ,XZ)
need to be plotted. See yapp(5NEMO)
. [Default: f]
- Maximum time to plot.
Default: autoscale from the orbit.
- Maximum X,Y,Z extent to plot. Default:
autoscale from -rmax to rmax.
- Maximum Jx,Jy,Jz extent to plot. Default:
autoscale from -jmax to jmax.
3-dec-93 V1.0 Created PJT
6-dec-93 V1.1 added nu pjt
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