Bases: astropy.cosmology.core.LambdaCDM
FLRW cosmology with a cosmological constant and no curvature.
This has no additional attributes beyond those of FLRW.
Parameters: | H0 : float or astropy.units.Quantity
Om0 : float
Tcmb0 : float or astropy.units.Quantity
Neff : float
m_nu : astropy.units.Quantity
name : str
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Examples
>>> from astropy.cosmology import FlatLambdaCDM
>>> cosmo = FlatLambdaCDM(H0=70, Om0=0.3)
The comoving distance in Mpc at redshift z:
>>> z = 0.5
>>> dc = cosmo.comoving_distance(z)
Methods Summary
efunc(z) | Function used to calculate H(z), the Hubble parameter. |
inv_efunc(z) | Function used to calculate \frac{1}{H_z}. |
Methods Documentation
Function used to calculate H(z), the Hubble parameter.
Parameters: | z : array_like
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Returns: | E : ndarray, or float if input scalar
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Notes
The return value, E, is defined such that H(z) = H_0 E.
Function used to calculate \frac{1}{H_z}.
Parameters: | z : array_like
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Returns: | E : ndarray, or float if input scalar
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Notes
The return value, E, is defined such that H_z = H_0 / E.