Special Feature: The 3rd Takagi Lectures

Japanese Journal of Mathematics

, Volume 3, Issue 1, pp 49-92

Do-it-yourself computational astronomy

Hardwares, algorithms, softwares, and sciences
  • Junichiro MakinoAffiliated withCenter for Computational Astrophysics, National Astronomical Observatory of Japan Email author 

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Abstract

We overview our GRAPE (GRAvity PipE) and GRAPE-DR project to develop dedicated computers for astrophysical N-body simulations. The basic idea of GRAPE is to attach a custom-build computer dedicated to the calculation of gravitational interaction between particles to a general-purpose programmable computer. By this hybrid architecture, we can achieve both a wide range of applications and very high peak performance. GRAPE-6, completed in 2002, achieved the peak speed of 64 Tflops. The next machine, GRAPE-DR, will have the peak speed of 2 Pflops and will be completed in 2008.

We discuss the physics of stellar systems, evolution of general-purpose high-performance computers, our GRAPE and GRAPE-DR projects and issues of numerical algorithms.

Keywords and phrases

computational science special-purpose computer numerical algorithms

Mathematics Subject Classification (2000)

85-08 68Mxx