To install the package:
julia> Pkg.add("Cosmology")
Then, to load into your session:
julia> using Cosmology
First, pick a cosmological model using the cosmology function,
which takes the following options:
| h = 0.7079 | Dimensionless Hubble constant |
| OmegaK = 0 | Curvature density, Ωk |
| OmegaM = 0.29 | Matter density, Ωm |
| OmegaR = Ωγ + Ων | Radiation density, Ωr |
| Tcmb = 2.725820831 | CMB temperature (K), used to compute Ωγ |
| Neff = 3.04 | Effective number of massless neutrino species, used to compute Ων |
| w0 = -1 | CPL dark energy equation of state, w = w0 + wa*(1-a) |
| wa = 0 | CPL dark energy equation of state, w = w0 + wa*(1-a) |
julia> using Cosmology
julia> C = cosmology()
Cosmology.FlatLCDM{Float64}(0.7079, 0.6999165470916852, 0.3, 8.345290831484895e-5)
julia> C = cosmology(OmegaK=0.1)
Cosmology.OpenLCDM{Float64}(0.7079, 0.1, 0.5999165470916853, 0.3, 8.345290831484895e-5)
julia> c = cosmology(w0=-0.9, OmegaK=-0.1)
Cosmology.ClosedWCDM{Float64}(0.7079, -0.1, 0.7999165470916852, 0.3, 8.345290831484895e-5, -0.9, 0.0)
| angular_diameter_dist_mpc(cosmo, z) | Ratio of an object's proper transverse size (in Mpc) to its angular size (in radians) |
| comoving_radial_dist_mpc(cosmo, z) | Comoving radial distance to redshift z, in Mpc |
| comoving_volume_gpc3(cosmo, z) | Comoving volume out to redshift z, in Gpc3 |
| luminosity_dist_mpc(cosmo, z) | Bolometric luminosity distance, in Mpc |
| distmod(cosmo, z) | Distance modulus, in units of magnitude |
julia> using Cosmology
julia> C = cosmology(OmegaM=0.27)
Cosmology.FlatLCDM{Float64}(0.7079, 0.6999165470916852, 0.27, 8.345290831484895e-5)
julia> luminosity_dist(C, 1)
6653.8655390874155 Mpc
julia> angular_diameter_dist_mpc(C, 1)
1663.4663847718539 Mpc
julia> comoving_radial_dist(C, 1)
3326.9327695437078 Mpc
| age_gyr(cosmo, z) | Age of the universe at redshift z, in Gyr |
| lookback_time_gyr(cosmo, z) | Difference between age at redshift 0 and age at redshift z, in Gyr |
julia> using Cosmology
julia> C = cosmology(OmegaM=0.27)
Cosmology.FlatLCDM{Float64}(0.7079, 0.7299165470916852, 0.27, 8.345290831484895e-5)
julia> age(C, 0)
13.705983172937254 Gyr
julia> age(C, 1)
5.952350017688919 Gyr