Discovery LCDM
Medium-volume Gravity-Only sim with w0wa counterpart.
When to use: Comparisons of LCDM and w0wa cosmologies.
Key facts
| Property | Value |
|---|---|
| Box size | 1020 Mpc/h |
| Gravity particles | 67203 |
| Gravity particle mass | 2.98 × 108 Msun/h |
Snapshot steps
| Step | Redshift |
|---|---|
| 499 | z = 0.0 |
| 453 | z = 0.1 |
| 331 | z = 0.5 |
| 247 | z = 1.01 |
| 163 | z = 2.02 |
Access
Access requires membership in the OpenCosmoALCF Globus group.
Membership requests can be submitted from each group's page in the Globus Groups web interface.
About this dataset
Discovery LCDM is one of two OpenCosmo Discovery simulations motivated by the DESI Year-1 BAO+CMB cosmological constraints. It evolves 67203 gravity particles in a 1020 Mpc/h box using a flat LCDM cosmology with {Ωm, Ωb h², h, σ8, ns, w0, wa} = {0.3069, 0.0225, 0.6797, 0.8135, 0.968, -1, 0}.
The LCDM and w0wa runs use a common realization and approximately the same 1.5 Gpc physical volume and physical particle-mass resolution. The associated Discovery study uses the full simulation outputs to compare matter power spectra, halo abundances, and halo assembly histories. Because matter densities, fluctuation amplitude, spectral index, and Hubble parameter also differ between the cosmologies, results reflect the full cosmological-model difference—not only the dark-energy equation of state.
The portal currently exposes only snapshot halo catalogs at z = 0, 0.1, 0.5, 1.01, and 2.02. These catalogs support paired halo-abundance and catalog-property comparisons; matter power spectra and assembly-history products described in the paper are not currently exposed here.