Model of emission from η Car and the Homunculus together with Fermi-LAT data. The blue curves show emission from the Homunculus for different diffusion properties of the escaping CRs. The dotted curve (Model A) is for D₀ = 9 × 10²² cm² s⁻¹ and α = 0.5. The dashed-dotted curve (Model B) is for D₀ = 9 × 10²¹ cm² s⁻¹, α = 1, and a factor of 1.1 more escaping CRs compared to the model from W20. The red solid line shows the emission from η Car produced by particles accelerated at the shock towards η Car-B from W20 (the red dashed line is without absorption). The black dashed-dotted curve shows the combined emission from η Car-B and Model B.