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| Paper: |
Hybrid SPH and N-body Simulations of Star Clusters |
| Volume: |
453, Advances in Computational Astrophysics: Methods, Tools, and Outcome |
| Page: |
215 |
| Authors: |
Hubber, D. A.; Allison, R. J.; Smith, R.; Goodwin, S. P. |
| Abstract: |
Simulations of star cluster formation and evolution are usually
divided into the (magneto-)hydrodynamical evolution, and the N-body
evolution with separate codes. We present a new hybrid SPH and N-body
algorithm designed to bridge the divide between the two classes of
simulation. The ballistical motion of the stars is integrated with a
4th-order Hermite integrator, as used in many N-body codes, whereas the
background gas is modelled with a low-resolution SPH simulation with a
2nd-order leapfrog integrator. The stars can interact with the gas by
gravitational forces and mechanical and radiative feedback processes, thus
taking advantage of the various algorithms already implemented into the SPH
code. We have implemented our new approach into the SPH code SEREN and we
present one simple test case demonstrating the fidelity of the algorithm. We
discuss the assumptions and restrictions underlying the method and possible
future applications for star cluster research. |
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