SciPy

darkhistory.physics.xe_Saha

darkhistory.physics.xe_Saha(rs, species)

Saha equilibrium ionization value for H and He.

Parameters:
rs : float

The redshift in 1+z.

species : {‘HI’, ‘HeI’}

The relevant species.

Returns:
float

The Saha equilibrium xe.

Notes

See astro-ph/9909275 and 1011.3758 for details.

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