darkhistory.low_energy.lowE_photons.kappa_DM¶
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darkhistory.low_energy.lowE_photons.
kappa_DM
(photspec, xe)¶ Compute kappa_DM of the modified tla.
Parameters: - photspec : Spectrum object
spectrum of photons. Assumed to be in dNdE mode. spec.toteng() should return Energy per baryon.
Returns: - kappa_DM : float
The added photoionization rate due to products of DM.