Abstract
We describe the implementation of Aarseth’s NBODY2 code on a HP 1000 computer. We use the Extended Memory Array (EMA) feature with this code in order to investigate problems that include several hundreds of bodies, but the use of EMA requires some care in order to avoid large increases in computing time. The Vector Instruction Set (VIS) feature, a group of arithmetic subroutines that operates on arrays of floating point numbers and significantly reduces the computing time, turned out to be of little value for this application. We present the computing times demanded by two different problems for a variety of programs, including EMA and VIS. Finally, we present mass loss and mass accretion results for several simulations of galaxy-galaxy encounters performed with our implementation of the NBODY2 code.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Aarseth, S.J. (1985) ‘Direct Methods for N-Body Simulations’, in J.W. Brackbill and B.J. Cohen (eds.), Multiple Time Scales, New York Academic, pp. 377–418.
Aarseth, S.J. and Fall, S.M. (1980) ‘Cosmological N-Body Simulations of Galaxy Merging’, Astrophysical Journal, 236, 43–57.
Carpintero, D.D. and Muzzio, J.C. (1988) ‘Disintegration of a Satellite that Orbits around a Galaxy’, II Regional Meeting on Extragalactic Astronomy (Córdoba, Argentina), in press.
Dekel, A., Lecar, M. and Shaham, J. (1980) ‘N-body Simulations of Slow tidal Encounters and the Formation of Galactic Halos’, Astrophysical Journal, 241, 946–964.
Miller, G.E. (1983) ‘Effects of Galaxy Collisions on the Structure and Evolution of Galaxy Clusters. I. Mass and Luminosity Functions and Background Light’, Astrophysical Journal, 268, 495–512.
Muzzio, J.C. (1987) ‘Dynamical Evolution of Globular-Cluster Systems in Clusters of Galaxies’, Publications of the Astronomical Society of the Pacific, 99, 245–264.
Muzzio, J.C. (1988). ‘Cluster Swapping’, in J.E. Grindlay and A.G. Davis Philip (eds.1, The Harlow-Shapley Symposium on Globular Cluster Systems in Galaxies, pp. 297–309.
White, S.D.M. (1978) ‘Simulations of Merging Galaxies’, Monthly Notices of the Royal Astronomical Society, 184, 185–203.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 Kluwer Academic Publishers
About this paper
Cite this paper
Carpintero, D.D., Muzzio, J.C., Vergne, M.M. (1989). Implementation of an N-body Code in a HP 1000 Computer. In: Seidelmann, P.K., Kovalevsky, J. (eds) Applications of Computer Technology to Dynamical Astronomy. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0985-4_23
Download citation
DOI: https://doi.org/10.1007/978-94-009-0985-4_23
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6932-8
Online ISBN: 978-94-009-0985-4
eBook Packages: Springer Book Archive