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The Initial Condition of Cosmological
High-Resolution Simulations
T. Ogawa et al.
Chiba Univ., Japan
High-resolution algorithms, such as the adaptive renement
method, realize the calculation that treats small size objects in the
large computational box. Recently, these algorithms have been
applied to cosmological simulations by several authors. However,
the resolution of their INITIAL conditions is not high. The initial
condition of cosmological simulations is given as power spectrum,
P (k). The real space density distribution, (x), is created from
P (k) using the fast Fourier transform (FFT) technique. The reso-
lution of these initial conditions are constrained by the mesh size,
in other words, high-frequency components of (x) are neglected
initially. We argue the need for cosmological high-resolution sim-
ulations to use a high-resolution initial condition, in other words,
an initial condition including high-frequency components. We
present the method of creating these initial condition and esti-
mate its computational cost.
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