## BolshoiP

The BolshoiP simulation belongs to the BolshoiP Project and is kin to the Bolshoi simulation. It has the same simulation volume of (250 Mpc/h) ^{3} and a mass resolution of 1.35 * 10^{8} M_{sun}/h, but is based on the Planck cosmology.

Please give proper Credits when using data from this simulation.

### Details

Box size | 250 Mpc/h | side length of the cosmological cube |

Number of particles | 2048^{3 } |
total number of dark matter particles |

Mass resolution | 1.55 * 10^{8} M_{sun}/h |
mass of one dark matter particle |

Force resolution | 1.0 kpc/h | physical force resolution |

Initial redshift | 80 | redshift at which the simulation started |

Cosmology | ||

h | 0.70 | Hubble parameter |

Ω_{Λ} |
0.69289 | density parameter for dark energy |

Ω_{m} |
0.30711 | density parameter for matter (dark matter+baryons) |

Ω_{b} |
0.048 | density parameter for baryonic matter |

n | 0.96 | normalization of the Power spectrum |

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

### BolshoiP data in the database

The following table provides an overview on the database tables which are available for this simulation. For each table, a link to its “table type” is given, which leads to a page explaining the individual columns of the corresponding table in more detail.

Several tables may contain a Peano-Hilbert key (phkey) for each row, which can be constructed from the position using the hilbert key function. If not indicated otherwise, the hilbert order for this simulation is 10, i.e. there are 2^{10} = 1024 cells per dimension.

Database table | Table type | Short description |
---|---|---|

AvailHalos | AvailHalos | Gives an overview on the snapshots, for which halo data are stored in the FOF or BDM tables. |

BDMV | BDM | BDM (Bound Density Maximum) catalogue for all available snapshots, calculated using the standard overdensity criterion with 360*ρ (background density)._{back}`bdmId = ( snapnum*10` |

BDMW | BDM | BDM catalogue for all available snapshots, calculated using 200*ρ (critical density) for defining the halo boundary._{crit}`bdmId = ( snapnum*10` |

FOF | FOF | Main Friends-of-Friends catalogue for all available snapshots, level 0 (relative linking length 0.17);`fofId = (snapnum*10 + level)*10` |

FOF1-FOF5 | FOF | Friends-of-Friends catalogue for all available snapshots, same as FOF-table, but for smaller (relative) linking lengths, levels 1 (linking length 0.085) to 4 (linking length 0.010625). Thus these tables contain substructures of the FOF groups. |

Redshifts | Redshifts | Overview on snapshot numbers (snapnum) and corresponding redshifts |