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Welcome to Curie HZ poject webpage

**Overview of the Project**

In 2011, we were awarded a PRACE project with 5 million cpu hours in the recently installed CURIE supercomputer at the TGCC near Paris. The title of the project was

*Large Scale simulations of Ly-α and Ly-break galaxies in the high-z universe: Probing the epoch of reionization.*

The main goal of this project was to generate a mass limited complete volume sample of resimulated objects at high-z (from z≈ 3 to 6). To this end, we have simulated a cubic box 200 h^{-1} Mpc with different resolutions and physics, ranging from 512^{3} to 2048^{3 }particles. These simulations of the whole box have been used to identify the objects of interest in order to generate the initial conditions for the resimulations. We made use of a new Initial Conditions Generation code called GINNUNGAGAP written by Steffen Knollmann at UAM. This code has some new features such as variable domain decompositions (slab or pencil) for the Fast Fourier Transform in 3D, fully parallel random number generator and the realizations of random gaussian fluctuations in real space, rather than in Fourier space. Increasing levels of mass refinements can easily be generated in this way to almost unlimited number, provided that there are sufficiente computational MPI nodes. Thanks to the pencil domain decomposition, there is no limitation in the mesh sizes used to compute the density fields and to FFT them.

**Cosmological Parameters**

The simulations have been run using the set of cosmological parameters that best fits the current cosmological observational constrains, namely, the combination of WMAP7+BAO+SNIa.

Cosmological parameters of CURIE HZ simulations |
||

h | 0.70 | Hubble parameter |

Ω_{Λ} |
0.73 | Density parameter for dark energy |

Ω_{m} |
0.27 | Density parameter for matter (dark matter+baryons) |

Ω_{b} |
0.0469 | Density parameter for baryonic matter |

n | 0.95 | Normalization of the Power spectrum |

σ_{8} |
0.82 | Amplitude of mass density fluctuation in 8 Mpc/h sphere (at redshift z=0) |

**Full Box Simulations of CURIE HZ**Several simulations of the full box of 200 h

^{-1}Mpc down to z=0 have been done in the CURIE supercomputer.

Type |
#particles |
Z_{init} |
Z_{end} |

dark matter only |
512^{3} |
90 | 0 |

dark matter only | 1024^{3} |
100 | 0 |

SPH + radiative physics+sfr+winds (Springel & Hernquist model) |
1024^{3} +1024^{3} |
100 | 0 |