Struct DerivedParams 

pub struct DerivedParams {

    pub h: f64,
    pub h2: f64,
    pub t_cmb0_k: f64,
    pub t_nu0_base_k: f64,
    pub t_nu0_k: f64,
    pub omega_b0: f64,
    pub omega_cdm0: f64,
    pub omega_m0: f64,
    pub omega_k0: f64,
    pub omega_de0: f64,
    pub omega_g0: f64,
    pub omega_ur0: f64,
    pub omega_nu0: f64,
    pub omega_gnu0: f64,
    pub omega_non_de0: f64,
}

Single source of truth for cosmological composition at z = 0.

This struct contains only physical densities (ω ≡ Ω h²) and derived temperatures. Any hot-path computations (E(z), distances, growth, etc.) should use values from here to avoid divergence across components.

Fields

h: f64

Dimensionless Hubble parameter h.

h2: f64

h² (cached).

t_cmb0_k: f64

CMB temperature today in Kelvin.

t_nu0_base_k: f64

Base neutrino temperature: T_ν0,base = (4/11)^(1/3) * T_cmb0

This is the background temperature used for the Split model.

t_nu0_k: f64

Effective neutrino temperature used for the Effective model.

This scales the bath by (N_eff / N_species)^(1/4) so the total relativistic energy density matches n_eff.

omega_b0: f64

Physical baryon density ω_b0.

omega_cdm0: f64

Physical cold dark matter density ω_cdm0.

omega_m0: f64

Total matter physical density ω_m0 = ω_b0 + ω_cdm0.

omega_k0: f64

Physical curvature density ω_k0.

omega_de0: f64

Physical dark energy density ω_de0 (Λ in ΛCDM).

omega_g0: f64

Physical photon density ω_γ0.

omega_ur0: f64

Massless-only (UR) contribution used in the Split model; 0.0 in Effective mode.

omega_nu0: f64

Total neutrino physical density ω_ν0 (massive + any species included via the model).

omega_gnu0: f64

Sum of present-day physical densities for photons + UR + neutrinos.

Note: this does not imply strict (1+z)^4 scaling for the massive part at all z.

omega_non_de0: f64

Sum of all non-dark-energy components today: ω_non_de0 = ω_γ0 + ω_ur0 + ω_ν0 + ω_m0 + ω_k0

Implementations

impl DerivedParams

pub fn new( h: f64, t_cmb0: f64, omega_b: f64, omega_cdm: f64, omega_k: f64, omega_de: f64, omega_g: f64, omega_ur: f64, omega_nu: f64, t_nu0_base: f64, t_nu0: f64, ) -> Self

Construct DerivedParams and precompute cached sums.

Trait Implementations

impl Clone for DerivedParams

fn clone(&self) -> DerivedParams

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DerivedParams

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.