Simulating Molecular Clouds in Dwarf Spheroidal Galaxies: Simplified Aarseth N body Code with Super Storage

Details Simulating Molecular Clouds in Dwarf Spheroidal Galaxies: Simplified Aarseth N body Code with Super Storage Simulating Molecular Clouds in Dwarf Spheroidal Galaxies: Simplified Aarseth N body Code with Super Storage

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.3801b&link_type=abstract

American Astronomical Society, 189th AAS Meeting, #38.01; Bulletin of the American Astronomical Society, Vol. 28, p.1318

Astronomy and Astrophysics

Astronomy

Scientific paper

Variations have been implemented on the standard Aarseth individual time step n body code for future use in simulations of the dynamical effects of molecular clouds in dwarf spheriodal galaxies. The clouds will be many times more massive than a typical star so that various simplifying approximations can be made to speed up the code. One variation has been to assume that large variations from sphericity will not occur so that only the first (m=0) multipole approximation will be needed i.e. particles interior to the clould act as a common mass at the center and particles exterior have no effect. Only the cloud is felt as a single particle by the stars in the galaxy. We will describe various strategies which are used to speed operation of the code under these assumptions in terms of tabulating interior and exterior particles. We also discuss how the individual time step nature of the Aarseth code can be used to greatly save on storage space required to record the positions and velocities of stars and clouds at different times during the simulations. This work was supported by NSF REU grant AST-9424226

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