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mkbaredisk - make an exponential disk
mkbaredisk out=out_file
[parameter=value] ...
mkbaredisk makes an N-body realization of
an exponential disk, assuming no other mass distribution is present. Such
disks are wildly unstable, but fun to play with.
The following
parameters are recognized.
- out=out_file
- Write to out_file in snapshot(5NEMO)
form. Default: required.
- nbody=num_bodies
- Usual number of particles. Default:
1024.
- alpha=disk_alpha
- Inverse exponential scale length of disk. Default:
4.0.
- rcut=disk_cutoff
- Outer cutoff radius of disk. Default: 1.25.
- mdisk=disk_mass
- Total disk mass. Default: 1.0.
- Qtoomre=disk_Q_value
- Toomre’s Q parameter for
disk. Default: 1.0.
- gamma=fudge_factor
- Used when correcting for pressure support.
Default: 1.0.
- epsi=softening_parameter
- Softening, which sets the vertical
scale of the disk. Default: 0.025.
- seed=random_seed
- Usual random number seed.
Default: 12345.
- headline=message
- Text headline for output. Default: none.
mktestdisk(1NEMO)
, mkexpdisk(1NEMO)
, mkexphot(1NEMO)
Joshua
E. Barnes
2-jun-88 V1.0 original version JEB
29-mar-97 V2.0 SINGLEPREC, ndisk= now nbody= PJT