# Parent Simulation

First we constructed a parent simulation of sufficient size to include thousands of Milky Way sized systems but also of sufficient resolution to construct good Lagrangian volumes. We decided on ~10,000 particles per Milky Way-sized host and a 100 Mpc/h volume. Our

`level_max=10`

, which means our parent simulation’s effective resolution is (2^10)^3 = 1024^3, i.e. a parent particle mass,$m_p = 8.72 \times 10^7 M_\odot$

# parentics.conf

[setup]

boxlength = 100

zstart = 127

levelmin = 10

levelmin_TF = 10

levelmax = 10

padding = 8

overlap = 4

ref_center = 0.5, 0.5, 0.5

ref_extent = 0.2, 0.2, 0.2

align_top = yes

baryons = no

use_2LPT = no

use_LLA = no

periodic_TF = yes

[cosmology]

Omega_m = 0.3175

Omega_L = 0.6825

Omega_b = 0.049

H0 = 67.11

sigma_8 = 0.8344

nspec = 0.9624

transfer = eisenstein

[random]

seed[10] = 34567

[output]

format = gadget2

filename = ./ics

gadget_num_files = 128

[poisson]

fft_fine = yes

accuracy = 1e-5

pre_smooth = 3

post_smooth = 3

smoother = gs

laplace_order = 6

grad_order = 6

Last modified 3yr ago