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(Abridged) Following on from a recently completed radial-velocity survey ofthe old (7 Gyr) open cluster NGC 188 in which we study in detail the solar-typehard binaries and blue stragglers of the cluster, here we investigate thedynamical evolution of NGC 188 through a sophisticated N-body model. We employthe observed binary properties of the young (150 Myr) open cluster M35, wherepossible, to guide our choices for parameters of the initial binary population.At 7 Gyr the main-sequence solar-type hard-binary population in the modelmatches that of NGC 188 in both binary frequency and distributions of orbitalparameters. This agreement between the model and observations is in a largepart due to the similarities between the NGC 188 and M35 solar-type binaries.Indeed, among the 7 Gyr main-sequence binaries in the model, only those withP>1000 days show potentially observable evidence for modifications by dynamicalencounters. This emphasizes the importance of defining accurate initialconditions for star cluster models, which we propose is best accomplishedthrough comparisons with observations of young open clusters like M35.Furthermore, this suggests that observations of the present-day binaries ineven old open clusters can provide valuable information on their primordialbinary populations. However, despite the model's successes at matching the truecluster, the model underproduces blue stragglers and produces an overabundanceof long-period circular main-sequence--white-dwarf binaries as compared to NGC188. We conclude that improvements in the physics of mass transfer and commonenvelope may in fact solve both discrepancies with the observations. Thisproject highlights the unique accessibility of open clusters to bothcomprehensive observational surveys and full-scale N-body simulations, andunderscores the importance of open clusters to the study of star clusterdynamics.

Direct N-Body Modeling of the Old Open Cluster NGC 188: A Detailed Comparison of Theoretical and Observed Binary Star and Blue Straggler Populations