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The progeny of stellar dynamics and stellar evolution within an N-body model of NGC 188

Published online by Cambridge University Press:  18 January 2010

Aaron M. Geller ,
Jarrod R. Hurley  and
Robert D. Mathieu
Aaron M. Geller
Affiliation:
University of Wisconsin–Madison, 475 N. Charter Street, Madison WI 53706, USA
Jarrod R. Hurley
Affiliation:
Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122, Australia
Robert D. Mathieu
Affiliation:
University of Wisconsin–Madison, 475 N. Charter Street, Madison WI 53706, USA
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Abstract

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We present a direct N-body simulation modeling the evolution of the old (7 Gyr) open cluster NGC 188. This is the first N-body open cluster simulation whose initial binary population is directly defined by observations of a specific open cluster: M35 (150 Myr). We compare the simulated color–magnitude diagram at 7 Gyr to that of NGC 188, and discuss the blue stragglers produced in the simulation. We compare the solar-type main-sequence binary period and eccentricity distributions of the simulation to detailed observations of similar binaries in NGC 188. These results demonstrate the importance of detailed observations in guiding N-body open cluster simulations. Finally, we discuss the implications of a few discrepancies between the NGC 188 model and observations and suggest a few methods for bringing N-body open cluster simulations into better agreement with observations.

Keywords

open clusters and associations: individual (NGC 188)binaries: spectroscopicblue stragglersN-body simulations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S266: Star clusters: basic galactic building blocks throughout time and space , August 2009 , pp. 258 - 263
Copyright
Copyright © International Astronomical Union 2010

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