Evolution of the n2blb perturbation. Top row: cross-sections of the log number density log (n [cm⁻³]) in the n2blb model’s ecliptic plane at Δt ∈{0, 4, 7, 9, 14} × 4.4828 kyr after injecting the perturbation (distances in pc). Six bottom rows: synthetic observations of the above models in Hα (rows 2 and 3) andbremsstrahlung (rows 4 and 5) [erg cm⁻² s⁻¹ sr⁻¹] and 70 μm dust emission [Jy sr⁻¹] (rows 6 and 7) at the same times and at a distance of 617 pc, face-on (rows 2, 4, and 6) and edge-on (rows 3, 5, and 7) to the ecliptic (angular extent in degrees). The colour scales have been truncated at the bottom end; values below the minimum threshold are not displayed. The solid angle per pixel is 1.00 × 10⁻⁸ sr.