Density contour for an expanding galactic bubble in a magnetized halo with a dipolar magnetic field at t = 10 Myr. The galactic wind has a mass flux of Ṁ = M_⊙ yr⁻¹. Top panel: B₀ = 10⁻⁴ Gauss (left) and B₀ = 10⁻⁵ Gauss (right). Bottom panel: dipole B₀ = 10⁻² Gauss (left) and B₀ = 1 Gauss (right). The isocontour of the density is represented by white, blue and black lines, corresponding to their respective density isocontour values of 5 × 10⁻²⁶, 5 × 10⁻²⁶ and 1.2 × 10⁻²⁵, respectively.