Stellar collisions during binary–binary and binary–single star interactions

@article{Fregeau2004StellarCD,
  title={Stellar collisions during binary–binary and binary–single star interactions},
  author={John Fregeau and Pokman Cheung and Simon Portegies Zwart and Frederic A. Rasio},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2004},
  volume={352},
  pages={1-19}
}
Physical collisions between stars occur frequently in dense star clusters, either via close encounters between two single stars, or during strong dynamical interactions involving binary stars. Here we study stellar collisions that occur during binary-single and binary-binary interactions, by performing numerical scattering experiments. Our results include cross-sections, branching ratios and sample distributions of parameters for various outcomes. For interactions of hard binaries containing… Expand
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References

SHOWING 1-10 OF 96 REFERENCES
Modelling collision products of triple-star mergers
In dense stellar clusters, binary-single and binary-binary encounters can ultimately lead to collisions involving two or more stars during a resonant interaction. A comprehensive survey of multistarExpand
Computer simulations of gravitational encounters between pairs of binary star systems
Encounters (collisions) between pairs of binary stars were computer simulated. The 41 564 gravitational collisions were divided into five mass families and all binaries initially had circular orbits.Expand
Stellar Collisions in Globular Clusters and the Blue Straggler Problem
The hypothesis that the blue stragglers in globular clusters are produced by physical stellar collisions is critically examined. The most serious objection to the collisional hypothesis is thatExpand
Close approach during hard binary-binary scattering
We report on an extensive series of numerical experiments of binary--binary scattering, analysing the cross--section for close approach during interactions for a range of hard binary parameters ofExpand
Computer simulations of encounters between massive black holes and binaries
Over 800,000 encounters of binaries with black holes having masses that range from 10 to 10,000 times that of the binary components were simulated. The calculations at many collision velocities andExpand
Triple interactions involving close binaries in globular clusters
The interaction of a circularized tidal binary system with a third star is studied statistically through the results of about 70,000 numerical scattering experiments. The stars involved are taken toExpand
Encounters between binaries and neutron stars
We simulated encounters between a neutron star and primordial and tidal-capture binaries. In the case of encounters involving a tidal-capture binary, comprising a white dwarf and a main-sequenceExpand
Dynamics and Interactions of Binaries and Neutron Stars in Globular Clusters
We model the dynamics of test binaries in isotropic, multi-mass models of galactic globular clusters. The evolution of binary orbits through the cluster potentials is modeled, including second orderExpand
Hydrodynamics of collisions between binary stars
Hydrodynamical processes in collisions between two binary stars, presumed to have formed by tidal capture, are investigated using a smoothed particle hydrodynamics code. Stellar mergers occurExpand
Monte Carlo simulations of globular cluster evolution. III. Primordial binary interactions
We study the dynamical evolution of globular clusters using our two-dimensional Monte Carlo code with the inclusion of primordial binary interactions for equal-mass stars. We use approximateExpand
...
1
2
3
4
5
...