halomod.wdm.HaloModelWDM.bias_effective_matter¶
- property HaloModelWDM.bias_effective_matter: float¶
The effective bias of matter in DM halos.
This should be unity for models in which all dark matter is encapsulated in halos. However, sometimes the pair of HMF/bias models chosen are not pairs in the peak-background split sense, and will not (even in principle) yield an integral of unity. Also, even when in principle the value should be unity, the numerical integral is over a limited range of mass, and will generally not account for all the mass in the Universe.
To account for this, if
force_unity_dm_bias
is True, the returned bias will be unity if the bias/HMF models are a pair. If they are not a pair, we still somewhat account for the limited mass range by returning the integral normalized by the mean density in halos greater than our minimum mass.If
force_unity_dm_bias
is False, none of these fudges are performed.