PAIR 3 'bullet'
Particle velocity fields for candidate pair #3. RS & FOF identify this pair as two separate halos. Here we only show particles from the smaller 'bullet'. FOF has overgrouped these particles which are clearly distinct in velocity space.
Red arrows correspond to particles belonging to an FOF group only, blue arrows to a RS group only, and cyan arrows correspond to particles identified by both.
Base of arrow represents particle location. Velocity vectors are normalized to the maximum particle velocity.