Reference/API

astropy.cosmology Package

Cosmology with Astropy.

cosmology contains classes and functions for cosmological distance measures and other cosmology-related calculations.

See the Cosmological Calculations (astropy.cosmology) for more detailed usage examples and references.

Functions

z_at_value(func, fval[, zmin, zmax, ztol, ...])	Find the redshift z at which func(z) = fval.
cosmology_equal(cosmo1, cosmo2, /, *[, ...])	Return element-wise equality check on the cosmologies.

Classes

Cosmology(*[, name, meta])	Base-class for all Cosmologies.
CosmologyError
FlatCosmologyMixin()	Mixin class for flat cosmologies.
FLRW(H0, Om0, Ode0, Tcmb0[, equivalencies, ...])	An isotropic and homogeneous (Friedmann-Lemaitre-Robertson-Walker) cosmology.
FlatFLRWMixin()	Mixin class for flat FLRW cosmologies.
LambdaCDM(H0, Om0, Ode0, Tcmb0[, ...])	FLRW cosmology with a cosmological constant and curvature.
FlatLambdaCDM(H0, Om0, Tcmb0[, ...])	FLRW cosmology with a cosmological constant and no curvature.
wCDM(H0, Om0, Ode0, Tcmb0[, equivalencies, ...])	FLRW cosmology with a constant dark energy EoS and curvature.
FlatwCDM(H0, Om0, Tcmb0[, equivalencies, ...])	FLRW cosmology with a constant dark energy EoS and no spatial curvature.
w0waCDM(H0, Om0, Ode0, Tcmb0[, ...])	FLRW cosmology with a CPL dark energy EoS and curvature.
Flatw0waCDM(H0, Om0, Tcmb0[, equivalencies, ...])	FLRW cosmology with a CPL dark energy EoS and no curvature.
w0wzCDM(H0, Om0, Ode0, Tcmb0[, ...])	FLRW cosmology with a variable dark energy EoS and curvature.
Flatw0wzCDM(H0, Om0, Tcmb0[, equivalencies, ...])	FLRW cosmology with a variable dark energy EoS and no curvature.
wpwaCDM(H0, Om0, Ode0, Tcmb0[, ...])	FLRW cosmology with a CPL dark energy EoS, a pivot redshift, and curvature.
FlatwpwaCDM(H0, Om0, Tcmb0[, equivalencies, ...])	FLRW cosmology with a CPL dark energy EoS, a pivot redshift, and no curvature.
Parameter(*, default, derived, unit, ...)	Cosmological parameter (descriptor).
default_cosmology()	The default cosmology to use.

Class Inheritance Diagram