SIMBAD references

2010MNRAS.407.1098A - Mon. Not. R. Astron. Soc., 407, 1098-1107 (2010/September-2)

The early dynamical evolution of cool, clumpy star clusters.

ALLISON R.J., GOODWIN S.P., PARKER R.J., PORTEGIES ZWART S.F. and DE GRIJS R.

Abstract (from CDS):

Observations and theory both suggest that star clusters form subvirial (cool) with highly substructured distributions. We perform a large ensemble of N-body simulations of moderate-sized (N = 1000) cool, fractal clusters to investigate their early dynamical evolution. We find that cool, clumpy clusters dynamically mass segregate on a short time-scale, that Trapezium-like massive higher order multiples are commonly formed, and that massive stars are often ejected from clusters with velocities >10 km/s (cf. the average escape velocity of 2.5 km/s). The properties of clusters also change rapidly on very short time-scales. Young clusters may also undergo core collapse events, in which a dense core containing massive stars is hardened due to energy losses to a halo of lower mass stars. Such events can blow young clusters apart with no need for gas expulsion. The warmer and less substructured a cluster is initially, the less extreme its evolution.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): stars: formation - stars: kinematics and dynamics

Status at CDS:  

Simbad objects: 9

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2020.04.10-21:29:07

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