NBodyLab Dual Model N-body Simulator for Tidal Shock/Relaxation Experiments
Overview
Tube/galaxy model:
Model   
plummer NEMO model
baredisk NEMO model
expdisk NEMO model
disk NEMO model
homsph NEMO model
polytrope NEMO model
spiral NEMO model
one particle, mass=1, pos=0,0,0 vel=0,0,0
premade galactICS Milky Way A model 1799 particles
premade Dubinski Andromeda model 4096 particles
premade Dubinski Milky Way model 4096 particles
premade Dubinski Andromeda model 410 particles
premade Dubinski Milky Way model 410 particles
premade Dubinski Milky Way model 4098 particles 10x disk
premade Dubinski Milky Way model 4098 particles 10x halo
premade Dubinski Milky Way model 1639 particles halo
premade Dubinski Milky Way model 1639 particles disk
premade Dubinski Milky Way model 820 particles bulge
premade Dubinski Andromeda model 1639 particles halo
premade Dubinski Andromeda model 1639 particles disk
premade Dubinski Andromeda model 820 particles bulge
premade Sellwood galactic bulge 4381 particles
none
Plummer NEMO model seed
Number of particles for NEMO models (<= 3000000)
OR Upload ASCII model file (line 1:# of particles, lines 2+: m,x,y,z,vx,vy,vz)   
NEMO packages scale factor
   type
mass and velocities
positions and velocities, retain virial ratio
positions
none
JW scaling: mass
position and vel(1/sqrt)
xy position
Rotation about axes (e.g. 0,90,0)
   order (e.g. zyz)
Shift (e.g. 0,.5,0) position
velocity
Z-spin angular frequency (+ is counterclockwise)
Cluster model:
Model   
plummer NEMO model
baredisk NEMO model
expdisk NEMO model
disk NEMO model
homsph NEMO model
polytrope NEMO model
spiral NEMO model
one particle, mass=1, pos=0,0,0 vel=0,0,0
premade galactICS Milky Way A model 1799 particles
premade Dubinski Andromeda model 4096 particles
premade Dubinski Milky Way model 4096 particles
premade Dubinski Andromeda model 410 particles
premade Dubinski Milky Way model 410 particles
premade Dubinski Milky Way model 4098 particles 10x disk
premade Dubinski Milky Way model 4098 particles 10x halo
premade Dubinski Milky Way model 1639 particles halo
premade Dubinski Milky Way model 1639 particles disk
premade Dubinski Milky Way model 820 particles bulge
premade Dubinski Andromeda model 1639 particles halo
premade Dubinski Andromeda model 1639 particles disk
premade Dubinski Andromeda model 820 particles bulge
premade Sellwood galactic bulge 4381 particles
none
Plummer NEMO model seed
Number of particles for NEMO models (<= 3000000)
OR Upload ASCII model file (line 1:# of particles, lines 2+: m,x,y,z,vx,vy,vz)   
NEMO packages scale factor
   type
mass and velocities
positions and velocities, retain virial ratio
positions
none
JW scaling: mass
position and vel(1/sqrt)
xy position
Rotation about axes (e.g. 0,90,0)
   order (e.g. zyz)
Shift (e.g. 0,.5,0) position
velocity
Z-spin angular frequency (+ is counterclockwise)
Integration parameters for tidal-shocking passes:
Type   
NEMO hackcode1 integrator without MD-GRAPE2 acceleration
Pomona integrator Runge Kutta 4th-order with MD-GRAPE2 acceleration
Pomona integrator Taylor 2nd-order with MD-GRAPE2 acceleration
Pomona integrator Euler 1st-order with MD-GRAPE2 acceleration
Pomona integrator Runge Kutta 4th-order host CPU
Pomona integrator Taylor 2nd-order host CPU
Pomona integrator Euler 1st-order host CPU
Number of iterations (<=500000)
Output state every nth interation, n=
dt (<=1)
   Softening factor (<=1)
Integration parameters for relaxation passes:
Type   
NEMO hackcode1 integrator without MD-GRAPE2 acceleration
Pomona integrator Runge Kutta 4th-order with MD-GRAPE2 acceleration
Pomona integrator Taylor 2nd-order with MD-GRAPE2 acceleration
Pomona integrator Euler 1st-order with MD-GRAPE2 acceleration
Pomona integrator Runge Kutta 4th-order host CPU
Pomona integrator Taylor 2nd-order host CPU
Pomona integrator Euler 1st-order host CPU
Number of iterations (<=500000)
Output state every nth interation, n=
dt (<=1)
   Softening factor (<=1)
Cluster modifications:
Tidal radius cutoff
Number of shock/relaxation passes:
Number of passes
Display:
Plot observation plane   
xy
yz
xz
   Plot range (-x:x) for all axes   
.25
.5
1
2
4
8
10
20
40
60
100
160
200
400
Animated GIF of evolution   
yes
no
Image and velocity maps   
yes
no
   Radial profiles   
yes
no
Slit spectrogram simulation   
yes
no
   position angle
   origin (x,y)
   width
NEMO command log for debugging   
yes
no
    Integration diagnostics   
yes
no
This web interface was developed by Dr. Bryan E. Penprase and Interconnect Technologies for
Pomona College
. Copyright (c) 2003 Interconnect Technologies Corp. and Pomona College.