Table of Contents

Name

mkbaredisk - make an exponential disk

Synopsis

mkbaredisk out=out_file [parameter=value] ...

Description

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.

Parameters

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.

See Also

mktestdisk(1NEMO) , mkexpdisk(1NEMO) , mkexphot(1NEMO)

Author

Joshua E. Barnes

History


2-jun-88    V1.0 original version           JEB
29-mar-97    V2.0 SINGLEPREC, ndisk= now nbody=    PJT