Dynamical mass segregation on a very short timescale

  title={Dynamical mass segregation on a very short timescale},
  author={R. Allison and S. Goodwin and R. J. Parker and R. Grijs and S. P. Zwart and M. Kouwenhoven},
  journal={The Astrophysical Journal},
  • R. Allison, S. Goodwin, +3 authors M. Kouwenhoven
  • Published 2009
  • Physics
  • The Astrophysical Journal
  • We discuss the observations and theory of star cluster formation to argue that clusters form dynamically cool (subvirial) and with substructure. We then perform an ensemble of simulations of cool, clumpy (fractal) clusters and show that they often dynamically mass segregate on timescales far shorter than expected from simple models. The mass segregation comes about through the production of a short-lived, but very dense core. This shows that in clusters like the Orion Nebula Cluster the stars… CONTINUE READING

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