MDR1 (mdr1)
Description
MDR1 is the first MultiDark simulation, performed in 2010. A detailed description is available in the paper Prada et al. 2011. This simulation contains about 8.6 billion particles in a (1 Gpc/h)3 cube and thus has a larger volume than the Millennium Simulation, using the more up-to-date WMAP5 cosmology.
Details
Box size | 1 Gpc/h | side length of the cosmological cube |
Number of particles | 20483 | total number of dark matter particles |
Mass resolution | 8.721*109 Msun/h | mass of one dark matter particle |
Force resolution | 7 kpc/h | physical force resolution |
Initial redshift | 65 | redshift at which the simulation started |
Cosmology | ||
h | 0.70 | Hubble parameter |
ΩΛ | 0.73 | density parameter for dark energy |
Ωm | 0.27 | density parameter for matter (dark matter+baryons) |
Ωb | 0.0469 | density parameter for baryonic matter |
n | 0.95 | normalization of the Power spectrum |
σ8 | 0.82 | amplitude of mass density fluctuation in 8 Mpc/h sphere (at redshift z=0) |
Other constants | ||
G | 6.67428 * 10-8 cm3 g-1 s-2 | Gravitational constant (Rev. Mod. Phys. 80 (2008) 633-730) |
1 Mpc | 30.85677 * 1023 cm | 1 Mpc in cm |
Msun | 1.98892 ± 0.00025 1033 g | Solar mass (Physics Reports 281 (1997) 309) |
Attribution
In order to properly acknowledge our efforts, we request the following paragraph to be included in the "Acknowledgements" section of any publication which makes use of the simulation data above via the CosmoSim or MultiDark database:
Acknowledgements – Database
The CosmoSim database used in this paper is a service by the Leibniz-Institute for Astrophysics Potsdam (AIP). The MultiDark database was developed in cooperation with the Spanish MultiDark Consolider Project CSD2009-00064.
Acknowledgements – Simulations
The authors gratefully acknowledge the Gauss Centre for Supercomputing e.V. (www.gauss-centre.eu) and the Partnership for Advanced Supercomputing in Europe (PRACE, www.prace-ri.eu) for funding the MultiDark simulation project by providing computing time on the GCS Supercomputer SuperMUC at Leibniz Supercomputing Centre (LRZ, www.lrz.de). The Bolshoi simulations have been performed within the Bolshoi project of the University of California High-Performance AstroComputing Center (UC-HiPACC) and were run at the NASA Ames Research Center.
More information can be found on the credit page.
Tables
Table | Description |
---|---|
AvailHalos mdr1.availhalos |
Gives an overview on the snapshots, for which halo data are stored in the FOF or BDM tables. |
BDMV mdr1.bdmv |
BDM (Bound Density Maximum) catalogue for all available snapshots, calculated using the standard overdensity criterion with 360 * ρback (background density). |
BDMVProf mdr1.bdmvprof |
Halo profiles of the BDMV catalogue for all available snapshots, calculated using the standard overdensity criterion with 360*ρback (background density). |
BDMW mdr1.bdmw |
BDM (Bound Density Maximum) catalogue for all available snapshots, calculated using the standard overdensity criterion with 200 * ρback (background density). |
BDMWMfreq mdr1.bdmwmfreq |
Galaxy cluster catalogue for distinct halos from the BDMW catalogue with a total mass (Mtot) above 1014 Msun/h, only for snapshots corresponding to the redshift values z = 0, 0.05, 0.1, 0.16, 0.18, 0.2, 0.27, 0.32, 0.37, 0.4, 0.47, 0.53, 0.61, 0.69, 0.78, 0.89 and 1. |
BDMWProf mdr1.bdmwprof |
Halo profiles of the BDMW catalogue for all available snapshots, calculated using the standard overdensity criterion with 200*ρback (background density). |
Dens1024_z0 mdr1.dens1024_z0 |
Density field for redshift 0, for 10243 grid cells |
Dens512_z0 mdr1.dens512_z0 |
Density field for redshift 0, for 5123 grid cells |
FOF mdr1.fof |
Main Friends-of-Friends catalogue for all available snapshots, level 0 (relative linking length 0.17); |
FOF1 mdr1.fof1 |
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. |
FOF2 mdr1.fof2 |
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. |
FOF3 mdr1.fof3 |
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. |
FOF4 mdr1.fof4 |
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. |
FOFMtree mdr1.fofmtree |
Merger trees for top level FOF groups (level=0) with > 2 * 1012 Msun/h from redshift 0. Substructures are not taken into account. |
FOFScl mdr1.fofscl |
FOF superclusters; contains Friends-of-Friends catalogues for redshift 0, for 7 different (relative) linking lengths between 0.35 (sclevel 0) and 0.17 (sclevel 6)), i.e. much larger objects (superclusters) than in the FOF table. It also contains identifiers for building substructure trees |
FOFSub mdr1.fofsub |
FOF substructure tree connecting the FOF – FOF4 catalogues at |
LinkLength mdr1.linklength |
Overview on levels for FOF groups and corresponding linking lengths (for FOF, FOF1 – FOF4 tables) |
LinkLengthScl mdr1.linklengthscl |
Overview on sclevels for superclusters and corresponding linking lengths (for FOFScl table) |
Redshifts mdr1.redshifts |
Overview on snapshot numbers (snapnum) and corresponding redshifts |
Rockstar mdr1.rockstar |
Consistent halo catalogue with merger trees |
TreeSnapnums mdr1.treesnapnums |
Maps between snapshot numbers used in the FOF merger trees for MDR1 and the “usual” snapshot numbers. |
Tweb512 mdr1.tweb512 |
Eigenvectors and eigenvalues of the gravitational tidal tensor, for a 5123 grid |
Vweb1024 mdr1.vweb1024 |
Eigenvectors and eigenvalues of the velocity shear tensor, for a 10243 grid |
Vweb512 mdr1.vweb512 |
Eigenvectors and eigenvalues of the velocity shear tensor, for a 5123 grid |