Joshua E. Barnes & John E. Hibbard

Identikit is a numerical method, combining test-particle and self-consistent techniques, which allows a rapid exploration of the parameter space of galactic encounters. It can be used to find the parameters required to reproduce the observed morphology and kinematics of interacting disk galaxies.

Identikit 1 example   Identikit 2 example
Identikit 1 model (points) matching a self-consistent N-body simulation of a galactic collision (grey scale). Each panel shows a different projection: top left shows sky-plane (X,Y), top right shows velocity-position (V, Y); bottom left shows position-velocity (X, V), bottom right shows (X, Z).   Identikit 2 model of NGC 4676. Grey-scale shows HI data (Hibbard & van Gorkom 1996), projected on (α,δ) plane (top left), (V,δ) plane (top right), and (α,V) plane (bottom left). Dark blue crosses mark galaxy centers, cyan and magenta boxes are phase-space regions, and points show model derived using these constraints. Spherical lattice (bottom right) displays functions used to select viewing direction.

Joshua E. Barnes      (barnes at
Updated: 07 November 2012
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