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Components

The following matrix shows which ingredients form each major observable.

Observable Required ingredients Integrator Map
Dispersion measure ionized gas DispersionMeasureIntegrator DispersionMeasureSkymap
Rotation measure ionized gas, magnetic field RotationMeasureIntegrator RotationMeasureSkymap
Free-free ionized gas FreeFreeIntegrator RadioSkymap
Synchrotron cosmic-ray electrons, magnetic field SynchroIntegrator RadioSkymap
Absorbed synchrotron electrons, magnetic field, ionized gas SynchroAbsorptionIntegrator RadioSkymap
Pion-decay gamma/neutrino cosmic rays, neutral gas, hadronic cross section PiZeroIntegrator GammaSkymap
Absorbed pion-decay gamma same plus photon field/pair production PiZeroAbsorptionIntegrator GammaSkymap
Bremsstrahlung electrons, neutral gas, bremsstrahlung model BremsstrahlungIntegrator GammaSkymap
Inverse Compton electrons, photon field, Klein-Nishina model InverseComptonIntegrator GammaSkymap
Dark matter particle spectrum, Galactic profile DarkMatterIntegrator GammaSkymap

Availability does not imply that every combination is scientifically valid over every energy range. Consult and cite the primary model references.