Simulations overview

The CosmoSim webpage provides access to several cosmological simulations, with a separate database for each simulation. Their main parameters are summarized in the table below for comparison. Please click on the name of a simulation to get more detailed information (if available).

Name Cosmology Ωm ΩΛ Ωb σ8 ns Box [Mpc/h] Particles Halo mass range [Msun/h]) Force resolution [kpc/h] Data in DB
ESMDPL
(ESMDPL_2048_Planck1)		 Planck 1 0.31 0.69 0.048 0.82 0.96 64 20483
5.3*107 – 2.8*1014
1.5 (high z) – 1 (low z)
VSMDPL Planck 1 0.31 0.69 0.048 0.82 0.96 160 38403
1.2*108 – 1.2*1015
2 (high z) – 1 (low z) [coming soon]
SMDPL
(SMD_3840_Planck1)
[Query]		 Planck 1 0.31 0.69 0.048 0.82 0.96 400 38403
1.9*109 – 1.7*1015
 1.5 FOF, Rockstar
MDPL
(MD_3840
_Planck1)
[Query]		 Planck 1 0.31 0.69 0.048 0.82 0.96 1000 38403
3.0*1010 – 4.2*1015
 13 (high z) – 5 (low z) BDM, FOF, Particles
MDPL2
(NewMD_3840
_Planck1)
[Query]		 Planck 1 0.31 0.69 0.048 0.82 0.96 1000 38403
3.0*1010 – 4.2*1015
 13 (high z) – 5 (low z) FOF, Rockstar, Galaxies
BigMDPL
(BigMD_3840
_Planck1)
[Query]		 Planck 1 0.31 0.69 0.048 0.82 0.96 2500 38403
4.7*1011 – 6*1015
 30 (high z) – 10 (low-z) Rockstar
HMDPL
(HMD_4096 _Planck1)
[coming soon]		 Planck 1 0.31 0.69 0.048 0.82 0.96 4000 40963
1.59*1012 – 7.13*1015
 50 (high redshift) – 25 (low redshift) [nothing yet]
BolshoiP

[Query]		 Planck 1 0.31 0.69 0.048 0.82 0.96 250 20483
2.7*109 – 1*1015
 1.0 BDM, FOF
Bolshoi

[Query]		 WMAP5 0.27 0.73 0.047 0.82 0.95 250 20483
2.7*109 – 8*1014
 1.0 BDM, FOF, Profiles, Particles, Density
MDR1
(MDark_2048
_om0.27)
[Query]		 WMAP 5 0.27 0.73 0.047 0.82 0.95 1000 20483
1.7*1011 – 1.6*1015
 7.0 BDM, FOF, Profiles, Particles, Mtree, Substructure, Density
BigMD27
(BigMD_3840
_om0.27)
[only on request]		 WMAP 5 0.27 0.73 0.047 0.82 0.95 2500 38403
4.2*1011 – 5.5*1015
 30 (high z) – 10 (low-z) [not planned]
BigMD29
(BigMD_3840
_om0.29)
[only on request]		 – 0.29 0.71 0.047 0.82 0.95 2500 38403
4.4*1011 – 5.6*1015
 30 (high z) – 10 (low-z) [not planned]
BigMD31
(BigMD_3840
_om0.31)
[only on request]		 – 0.31 0.69 0.047 0.82 0.95 2500 38403
4.1*1011 – 5.8*1015
 30 (high z) – 10 (low-z) [not planned]
HMDPL_nw
(HMD_NW)
[only on request]		 Planck 1 0.31 0.69 0.048 0.82 0.96 4000 40963
1.59*1012 – 7.13*1016
 [not planned]

The name given in the table is the name of the database; alternative names for the simulations are shown in grey.

The cosmological parameters are:

  • ΩΛ: density parameter for dark energy
  • Ωm: density parameter for matter (dark matter+baryons)
  • Ωb: density parameter for baryonic matter
  • ns: normalization of the Power spectrum
  • σ8: amplitude of mass density fluctuation in 8 Mpc/h sphere (at redshift z=0)
  • Box: side length of the cosmological box

The minimum halo mass is the mass of a halo containing 20 particles; the maximum halo mass is taken from the most massive BDMW halo or FOF group (for BigMD-simulations), to give an impression of the mass resolution and scale.

In the last column we list the data sets that are available in the database:

  • BDM: Bound Density Maximum halo catalogue
  • FOF: Friends-Of-Friends halo catalogue
  • Profiles: profiles of halos for inner properties
  • Particles: particle data, i.e. the raw snapshots
  • Mtree: merger trees for halo evolution history
  • Substructure: substructure information, i.e. links between halos and subhalos etc.
  • Density: density on a grid, also tidal and velocity information for each grid cell
  • Lum, Mag: luminosities and magnitudes

The simulations are completed, but it will still take some time until all the catalogues are created, prepared for publishing, and uploaded into the database. Please be patient and visit again from time to time to check the status!