Cosmology Parameters

ComovingCoordinates (external)

Flag (1 - on, 0 - off) that determines if comoving coordinates are used or not. In practice this turns on or off the entire cosmology machinery. Default: 0

CosmologyFinalRedshift (external)

This parameter specifies the redshift when the calculation will halt. Default: 0.0

CosmologyOmegaMatterNow (external)

This is the contribution of all non-relativistic matter (including HDM) to the energy density at the current epoch (z=0), relative to the value required to marginally close the universe. It includes dark and baryonic matter. Default: 0.279

CosmologyOmegaLambdaNow (external)

This is the contribution of the cosmological constant to the energy density at the current epoch, in the same units as above. Default: 0.721

CosmologyHubbleConstantNow (external)

The Hubble constant at z=0, in units of 100 km/s/Mpc. Default: 0.701

CosmologyComovingBoxSize (external)

The size of the volume to be simulated in Mpc/h (at z=0). Default: 64.0

CosmologyInitialRedshift (external)

The redshift for which the initial conditions are to be generated. Default: 20.0

CosmologyMaxExpansionRate (external)

This float controls the timestep so that cosmological terms are accurate followed. The timestep is constrained so that the relative change in the expansion factor in a step is less than this value. Default: 0.01

CosmologyCurrentRedshift (information only)

This is not strictly speaking a parameter since it is never interpreted and is only meant to provide information to the user. Default: n/a