Mimicking the large-scale structure of the Local Universe - Synthetic pre-labelled galaxies in large-scale structures

Open Access

Table A.1.

Parameters considered in this work for the SDSS-like simulation.

Default simulator configuration
Parameter	Value	Unit
General configuration

Seed	Random number based on hour and date
Number of voids	8089	Voids
Maximum diameter of simulated universe	1000	[h⁻¹ Mpc]
Number of CPU cores	Maximum of the host machine
Malmquist bias	True	Boolean
Reference catalogue	Alam et al. (2015)
Grid size for volume calculation	5	[h⁻¹ Mpc]³

Clusters

FoG bias	True	Boolean
Number of galaxies prob. distribution	SDSS
Number of galaxies SDSS prob. distribution	P_{n_i, C_i}(x) = (2233.15 × e^−x/15.03 + 0.97)/4822.5
Minimum number of galaxies per cluster	30	galaxies
Maximum number of galaxies per cluster	300	galaxies
Maximum radius prob. distribution	SDSS (fixed, depending on # of gal. in cluster: n_i)
Maximum radius SDSS formula	$R_{m a x, C_{i}} (n_{i}) = n_{i}^{1 / 3.32} / 2.59$ $Mathematical equation: $ R_{max,C_i}(n_i) = n_{i}^{1/3.32}/2.59 $$	[h⁻¹ Mpc]
Minimum radius	1	[h⁻¹ Mpc]
Maximum radius	4	[h⁻¹ Mpc]
Radial velocity dispersion	σ_v = −585.40e^−n_i/59.49 + 804.71	km/s

Walls & filaments

Wall galaxy density	0.18	galaxies × (h⁻¹ Mpc)⁻²
Minimum wall surface	0	× [h⁻¹ Mpc]⁻²
Maximum wall surface	2000	× (h⁻¹ Mpc)⁻²
Galaxy spatial distribution within a wall	Gaussian
Galaxy spatial distribution mean	μ = 0	[h⁻¹ Mpc]
Galaxy spatial distribution dispersion	σ = 0.5	[h⁻¹ Mpc]

Voids

Grid size for low density zones detection	5	[h⁻¹ Mpc]³
Determination of number of galaxies	By ratio (depending on other structures)
Number of galaxies ratio	N_void gal. = 0.116 × (N_cl. gal. + N_{w. & f. gal.})	galaxies

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