DEGRACE-pilot simulation suite

Overview

The DEGRACE-pilot suite (Data Paper) contains 64 cosmological models simulated using the (MG-)GLAM particle-mesh N-body code.

Property	Value
Gravity	LCDM, f(R)
Box size	1024 Mpc/h
Particles	2048^3
Mesh	4096^3
Realisations	5
Snapshots	z = 0, 0.25, 0.5, 0.75, 1.0, 1.25, 1.5
Halo finder	Boundary Density Maxima (BDM)
Cosmologies	64

Parameter space

Parameters are sampled using a Sobol sequence. Parameter File

Parameter	Minimum	Maximum
Ωm	0.15	0.45
h	0.60	0.80
S8	0.65	0.95
n_s	0.94	0.99
log10(-fR0)	-0.70	-0.45

Data products

• matter power spectra and correlation functions
  • Script: /cosma8/data/dp203/dc-ruan1/halocat/scripts/reformat_degrace_pilot_pk_mm.py
  • Command: python3 scripts/reformat_degrace_pilot_pk_mm.py --gravity fRn1 -ms 1 -me 64 --snapnum 137 --redshift 0.25 --verbose --overwrite
  • Load Example: python3 scripts/example_load_degrace_pk_mm.py --gravity fRn1 --redshift 0.25 -m 1 --ibox 1 --head 5
• halo catalogues
  • Script: /cosma8/data/dp203/dc-ruan1/halocat/scripts/reformat_degrace_pilot_halos.py
  • Command: python3 scripts/reformat_degrace_pilot_halos.py --gravity fRn1 -ms 1 -me 64 --snapnum 137 --redshift 0.25 --ibox-start 1 --ibox-end 5 --overwrite --verbose
  • Load Example: python3 scripts/example_load_degrace_halo.py --gravity fRn1 --redshift 0.25 --imodel 1 --ibox 1 --head
• halo mass functions
• halo-halo correlation functions
• halo pairwise velocity moments

Directory layout

On COSMA

/cosma8/data/dp203/dc-ruan1/degrace_pilot/gravity_{gravity}/z_{redshift:.2f}/
    imodel_1/
        box_1/
            halo.hdf5
            pk_mm.dat
            xi_hh.hdf5
            velocity_moments.hdf5
        box_2/
        box_3/
        box_4/
        box_5/
        box_{ibox}/
    imodel_2/
    imodel_{imodel}/
    ...
    imodel_64/

discriminator	values
gravity	'LCDM', 'fRn1'
redshift	0.25
imodel	1..64
ibox	1..5

Online (Post-processed Only)

(freyja)

Notes

Force resolution is set by the mesh with grid size

R = 250 kpc/h