Menu

FoF Halos   Galaxies (snapshot)   Galaxies (lightcone)

Mock Galaxy Catalog: Horizon Run 4 Simulation

Introduction

This is the mock galaxy catalogs in Horizon Run 4 simulation (Kim, Park, L'Huillier & Hong 2015) created by the most bound halo particle(MBP)-galaxy correspondence model (Hong, Park & Kim 2016).

Horizon Run 4 simulation is a cosmological N-body simulation with the following properties:

  • Box size: (3,150 cMpc/h)3
  • Number of matter particles: 6,3003
  • Cosmology: WMAP 5-year ΛCDM cosmology; (Ωm, ΩΛ, h, σ8, ns) = (0.26, 0.74, 0.72, 0.79, 0.96)

Data

The entire simulation box is split with 64 equal-volume subsamples. Each data file has a name as z[redshift]_[xbin][ybin][zbin].hdf5, which contains a subsample with 787.5×xbin ≤ x/(cMpc/h) ≤ 787.5×(xbin+1), 787.5×ybin ≤ y/(cMpc/h) ≤ 787.5×(ybin+1), 787.5×zbin ≤ z/(cMpc/h) ≤ 787.5×(zbin+1). Each data file is written as HDF5 file format containing the following properties:

  • x, y, z: Position in comoving coordinate (cMpc/h)
  • vx, vy, vz: Peculiar velocity (km/s)
  • mass: Mass of the galaxy (Msun/h; see the warning below)

Snapshot: z = 0

z0_000.hdf5z0_001.hdf5z0_002.hdf5z0_003.hdf5
z0_010.hdf5z0_011.hdf5z0_012.hdf5z0_013.hdf5
z0_020.hdf5z0_021.hdf5z0_022.hdf5z0_023.hdf5
z0_030.hdf5z0_031.hdf5z0_032.hdf5z0_033.hdf5
z0_100.hdf5z0_101.hdf5z0_102.hdf5z0_103.hdf5
z0_110.hdf5z0_111.hdf5z0_112.hdf5z0_113.hdf5
z0_120.hdf5z0_121.hdf5z0_122.hdf5z0_123.hdf5
z0_130.hdf5z0_131.hdf5z0_132.hdf5z0_133.hdf5
z0_200.hdf5z0_201.hdf5z0_202.hdf5z0_203.hdf5
z0_210.hdf5z0_211.hdf5z0_212.hdf5z0_213.hdf5
z0_220.hdf5z0_221.hdf5z0_222.hdf5z0_223.hdf5
z0_230.hdf5z0_231.hdf5z0_232.hdf5z0_233.hdf5
z0_300.hdf5z0_301.hdf5z0_302.hdf5z0_303.hdf5
z0_310.hdf5z0_311.hdf5z0_312.hdf5z0_313.hdf5
z0_320.hdf5z0_321.hdf5z0_322.hdf5z0_323.hdf5
z0_330.hdf5z0_331.hdf5z0_332.hdf5z0_333.hdf5

Snapshot: z = 0.5

See the warning below.

z0.5_000.hdf5z0.5_001.hdf5z0.5_002.hdf5z0.5_003.hdf5
z0.5_010.hdf5z0.5_011.hdf5z0.5_012.hdf5z0.5_013.hdf5
z0.5_020.hdf5z0.5_021.hdf5z0.5_022.hdf5z0.5_023.hdf5
z0.5_030.hdf5z0.5_031.hdf5z0.5_032.hdf5z0.5_033.hdf5
z0.5_100.hdf5z0.5_101.hdf5z0.5_102.hdf5z0.5_103.hdf5
z0.5_110.hdf5z0.5_111.hdf5z0.5_112.hdf5z0.5_113.hdf5
z0.5_120.hdf5z0.5_121.hdf5z0.5_122.hdf5z0.5_123.hdf5
z0.5_130.hdf5z0.5_131.hdf5z0.5_132.hdf5z0.5_133.hdf5
z0.5_200.hdf5z0.5_201.hdf5z0.5_202.hdf5z0.5_203.hdf5
z0.5_210.hdf5z0.5_211.hdf5z0.5_212.hdf5z0.5_213.hdf5
z0.5_220.hdf5z0.5_221.hdf5z0.5_222.hdf5z0.5_223.hdf5
z0.5_230.hdf5z0.5_231.hdf5z0.5_232.hdf5z0.5_233.hdf5
z0.5_300.hdf5z0.5_301.hdf5z0.5_302.hdf5z0.5_303.hdf5
z0.5_310.hdf5z0.5_311.hdf5z0.5_312.hdf5z0.5_313.hdf5
z0.5_320.hdf5z0.5_321.hdf5z0.5_322.hdf5z0.5_323.hdf5
z0.5_330.hdf5z0.5_331.hdf5z0.5_332.hdf5z0.5_333.hdf5

Snapshot: z = 1

See the warning below.

z1_000.hdf5z1_001.hdf5z1_002.hdf5z1_003.hdf5
z1_010.hdf5z1_011.hdf5z1_012.hdf5z1_013.hdf5
z1_020.hdf5z1_021.hdf5z1_022.hdf5z1_023.hdf5
z1_030.hdf5z1_031.hdf5z1_032.hdf5z1_033.hdf5
z1_100.hdf5z1_101.hdf5z1_102.hdf5z1_103.hdf5
z1_110.hdf5z1_111.hdf5z1_112.hdf5z1_113.hdf5
z1_120.hdf5z1_121.hdf5z1_122.hdf5z1_123.hdf5
z1_130.hdf5z1_131.hdf5z1_132.hdf5z1_133.hdf5
z1_200.hdf5z1_201.hdf5z1_202.hdf5z1_203.hdf5
z1_210.hdf5z1_211.hdf5z1_212.hdf5z1_213.hdf5
z1_220.hdf5z1_221.hdf5z1_222.hdf5z1_223.hdf5
z1_230.hdf5z1_231.hdf5z1_232.hdf5z1_233.hdf5
z1_300.hdf5z1_301.hdf5z1_302.hdf5z1_303.hdf5
z1_310.hdf5z1_311.hdf5z1_312.hdf5z1_313.hdf5
z1_320.hdf5z1_321.hdf5z1_322.hdf5z1_323.hdf5
z1_330.hdf5z1_331.hdf5z1_332.hdf5z1_333.hdf5

Warnings

#1. Galaxy Mass

Note that the mass of the galaxy is not the FoF halo mass, subhalo mass, or the stellar mass. It is a rather artificial mass-like quantity that you can use as a proxy of galaxy luminosity in a way that brighter galaxies have higher mass.

A typical example of using mass is to make a volume-limited galaxy sample up to a certain brightness threshold.

  1. First, calculate the number density of galaxies with the same brightness threshold from the observation.
  2. Next, find the minimum mass threshold from the mock galaxy catalog that gives the same galaxy number density.
  3. Then select the galaxies whose mass is above the given threshold to make the mock volume-limited galaxy sample.

However, note that the above example assumes that the both completeness of observation up to a given brightness threshold and the correlation between the given types of brightness and halo/stellar mass are very high.

#2. Spatial Distribution at High-z

The given mock galaxy catalog is tuned so that its two-point correlation function at z = 0 agrees well with the SDSS Main Galaxy Sample in scales between 0.1 Mpc/h -- 100 Mpc/h. However, it may not fully guarantee the good agreement of spatial distribution at higher z (e.g., z > 0.5).

If you have questions on the above issues, please contact Dr. Sungwook E. Hong.

References

Please cite the following references if you use the above mock galaxy catalog.

If you have a question, please contact Dr. Sungwook E. Hong.