Density slices for different wind configurations. The color corresponds to log₁₀(ρ), where ρ is in units of m_p/cm³, and the color-coding is different for the top and bottom rows. The top two panels use the same parameters of the i-wind, L_i = 10³⁹ erg s⁻¹, v = 2 × 10³ km s⁻¹, but different initial p-wind densities and velocities. In the left panel, the p-wind velocity is the same as in the i-wind, but the density is 60 times higher, and in the right panel, the density is the same as in the i-wind, but the velocity is higher by a factor of 6, i.e., ∼1.2 × 10⁴ km s⁻¹. The bottom left panel shows a simulation for twice higher i- and p-wind velocities, 4 × 10³ km s⁻¹ and ∼2.4 × 10⁴ km s⁻¹, respectively. Finally, the bottom right panel shows the case when the i-wind is much weaker than in the bottom left panel. In this case, the jet behavior follows a self-similar solution, when the underdense jet is recollimated by its cocoon. In all simulations, the half-opening angle of the p-wind was the same, ∼4 − 5°