Black Holes in Massive Star Clusters
Close encounters and physical collisions between stars in young dense clusters can result in new channels for stellar evolution, and
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Blue Stragglers as Tracers of Globular Cluster Evolution
Blue stragglers are natural phenomena in star clusters. They originate through mass transfer in isolated binaries, as well as through
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Dark Matter in Globular Clusters
We first review reasons why dark matter is an interesting issue in connection with star clusters. Next we consider to
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Exchange Cross Sections for Hard Binaries
We present results on the exchange cross section for the interaction between a hard binary and a field of single
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GRAPE-6: A Petaflops Prototype
We present the outline of a research project aimed at designing and constructing a hybrid computing system that can be
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Gravitational Thermodynamics
The gravitational N-body problem, for $N>2$, is the oldest unsolved problem in mathematical physics. Some of the most ideal examples
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High-Performance Special-Purpose Computers in Science
The next decade will be an exciting time for computational physicists. After 50 years of being forced to use standardized
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HUT Observations of the Lyman Limit in AGN: Implications for Unified Models
We observed a total of 13 low-redshift AGN with the Hopkins Ultraviolet Telescope (HUT) during the course of the Astro-1
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HUT Observations of Time-Variable Absorption in NGC 4151
We present the results of ultraviolet spectral monitoring of the Seyfert galaxy NGC 4151 performed by the Hopkins Ultraviolet Telescope
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Immersive 4D Interactive Visualization of Large-Scale Simulations
In dense clusters a bewildering variety of interactions between stars can be observed, ranging from simple encounters to collisions and
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Kuiper-belt Binary Formation through Exchange Reactions
Recent observations (Burnes et al 2002,Veillet et al 2002, Margot et al 2002a) have revealed an unexpectedly high binary fraction
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MODEST: modeling stellar evolution and (hydro)dynamics
Simulations of dense stellar systems currently face two major hurdles, one astrophysical and one computational. The astrophysical problem lies in
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On the dissolution of evolving star clusters
Using direct N-body simulations which include both the evolution of single stars and the tidal field of the parent galaxy,
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Panel Discussion on Observing Simulations and Simulating Observations
N-body simulations of star cluster evolution have reached a high degree of realism, by incorporating more and more elements of
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Primordial binaries and intermediate mass black holes in globular clusters
We present the first study of the dynamical evolution of a star cluster that combines a significant population of primordial
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Runaway Collisions in Star Clusters
We study the occurrence of physical collisions between stars in young and compact star cluster. The calculations are performed on
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Smooth Particle Hydrodynamics: Models, Applications, and Enabling Technologies
We present the results from a two-day study in which we discussed various implementations of Smooth Particle Hydrodynamics (SPH), one
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Star Cluster Ecology I: A Cluster Core with Encounters between Single Stars
Star clusters with a high central density contain an ecological network of evolving binaries, affected by interactions with passing stars,
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Star cluster ecology III: Runaway collisions in young compact star clusters
The evolution of young compact star clusters is studied using N-body simulations in which both stellar evolution and physical collisions
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Stellar Dynamics of Dense Stellar Systems
Stellar dynamics is almost unreasonably well suited for an implementation in terms of special-purpose hardware. Unlike the case of molecular
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The GRAPE-4, a Teraflops Stellar Dynamics Computer
Recently, special-purpose computers have surpassed general-purpose computers in the speed with which large-scale stellar dynamics simulations can be performed. Speeds
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Theory in a Virtual Observatory
During the last couple of years, observers have started to make plans for a Virtual Observatory, as a federation of
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The Role of Binaries in the Dynamical Evolution of Globular Clusters
Three important developments are vastly increasing our understanding of the role of binaries in the dynamical evolution of globular clusters.
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The Role of Binaries in the Dynamical Evolution of the Core of a Globular Cluster
The size of the core is one of the main diagnostics of the evolutionary state of a globular cluster. Much
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