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2005MNRAS.363..293H - Mon. Not. R. Astron. Soc., 363, 293-314 (2005/October-2)
A complete N-body model of the old open cluster M67.
HURLEY J.R., POLS O.R., AARSETH S.J. and TOUT C.A.
Abstract (from CDS):
The model contains 20 blue stragglers (BSs) at 4Gyr, which is slightly less than the 28 observed in M67. Nine are in binaries. The blue stragglers were formed by a variety of means and we find formation paths for the whole variety observed in M67. Both the primordial binary population and the dynamical cluster environment play an essential role in shaping the population. A substantial population of short-period primordial binaries (with periods less than a few days) is needed to explain the observed number of BSs in M67. The evolution and properties of two-thirds of the BSs, including all found in binaries, have been altered by cluster dynamics and nearly half would not have formed at all outside the cluster environment. On the other hand, the cluster environment is also instrumental in destroying potential BSs from the primordial binary population, so that the total number is in fact slightly smaller than what would be expected from evolving the same binary stars in isolation.
Abstract Copyright: 2005 RAS
Journal keyword(s): stellar dynamics - methods: {em N}-body simulations - binaries: close - blue stragglers - stars: evolution - open clusters and associations: general
Simbad objects: 7
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