HIGH RESOLUTION
SPH SIMULATION OF A VOID REGION IN A ΛCDM
UNIVERSE
by
S. Gottlober, A. Klypin, M. Hoeft, G. Yepes
SIMULATION
PARAMETERS.
Ω Λ=0.7, ΩΜ=0.3; Ωbar=0.02/h2 , h=0.7
Void
region of 20/h Mpc size at z=0 extracted from a simulated
Box of Lenght= 80 h-1 Mpc
For
more information on the dark matter distribution in this simulation
please read astro-ph/0305393
Multi-mass refinement initial conditions: with
4 levels of mass refinement ( Effective resolution 10243 particles)
SPH particle mass: =
6×106 h-1
Msun
Number of SPH
particles 1.37x106
Total number of particles: 5×106
Total number of individual Timesteps to
complete simulation 311,272
Simulation run in the AIP -
BEOWULF dual-ATHLON-MP 1.8+ Ghz computer with 16 nodes (32
processors)
Total CPU Time to complete
simulation: 1519 hours (2 months)
Gravitational smoothing in refined area:
0.8 /h
kpc
PHYSICAL
PROCESSES INCLUDED IN SIMULATION:
- Self-Gravity
- Hydrodynamics
- Radiative and
Compton Cooling
- Photoionisation by
UV background (Hardt and Madau F(v, z) flux evolution)
VIDEOS
Time
Evolution of 3D gas density in an 20/h Mpc box
centred at the center of mass of the void at each
timestep
GAS DENSITY
(640x480 AVI Movie with DIVX compression 8 Mbytes)
2-Dimensional slice through void
center of mass of the neutral hydrogen density at z =0
