SciPy

darkhistory.low_energy.lowE_photons.get_kappa_2s

darkhistory.low_energy.lowE_photons.get_kappa_2s(photspec)

Compute kappa_2s for use in kappa_DM function

Parameters:
photspec : Spectrum object

spectrum of photons. spec.toteng() should return Energy per baryon.

Returns:
kappa_2s : float

The added photoionization rate from the 1s to the 2s state due to DM photons.

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