Starlab version 4.4.1
    program created on Apr 27 2005 at 22:54:02
    source file     /home/steve/starlab/src/node/dyn/util/add_power_law.C

Add power-law parameters to an input snapshot and write it out
again.  Do not change the input data.  External field is basically
that of a power-law mass distribution
                M(r)  =  A r^x
except that the density is constant for r < a.  Parameters are 
interpreted in physical units if they have been specified with 
add_star, are converted to N-body units if necessary, and are 
written to the root log story for subsequent use by set_com,
scale, kira, etc.  Note that -e 0 is currently implemented as a 
Plummer field, and is flagged as such.

Usage: add_power_law [OPTIONS] < input > output

Options:      
              -A/M  specify coefficient [1]
              -c    add comment [none]
              -C    specify center [(0,0,0)]
              -e/E/x/X  specify exponent [0]
              -a/R  specify scale [1]
              -G    select parameters (physical units) appropriate
                    for the Galactic center (Mezger et al. 1999) [no]
              -n    force interpretation of all parameters in
                    N-body units [no]

Written by Steve McMillan.

Report bug to starlab (at) sns.ias.edu.