Young cluster simulation dynamics

<p>Velocity vectors of stars from a simulation with 200 stars: red arrows show unbound stars, blue arrows show bound stars. Gas expulsion happens at 2 Myr. The black dot shows the centre of the cluster.</p> <p>Backtracing: stars from the same simulation&nbsp;are backtracked using velocity vectors at t=10 Myr and assuming a linear relation. Bound stars are portrayed in blue&nbsp;and unbound stars in red.</p>