Models for Radiation Emitted by Galaxies

There are three main ways to model the radiation emitted by galaxies, governed largely by whether or not pop_sed_model is True or False.

pop_sed_model=True

In this case, we’re assuming that the source population is well-described by a single spectral energy distribution (SED). The relevant parameters are:

  • pop_sed
  • pop_yield
  • pop_yield_units
  • pop_Emin
  • pop_Emax
  • pop_EminNorm
  • pop_EmaxNorm

See the Parameter Listing page for information about the possible values of these parameters.

pop_sed_model=False

In this case, the SED of sources will not be considered in detail. Instead, the amount of radiation emitted in the Lyman-Werner, Lyman-continuum, and X-ray bands is determined by independent parameters.

Option 1: pop_fstar is not None In this case, the following parameters are fair game:

  • pop_Nion
  • pop_fesc
  • pop_Nlw
  • pop_cX
  • pop_fX

Option 2: pop_fstar is None In this case, only three parameters are relevant:

  • pop_xi_LW
  • pop_xi_UV
  • pop_xi_XR