Intensity maps centered on HOPS 403, HOPS 405, HOPS 407, and HOPS 404 integrated over the velocity ranges shown in the upper-left corner of each subfigure. Contour levels: between 5 and 35 K km s⁻¹ at intervals of 5 K km s⁻¹ for HOPS 403 J = 3–2 and J = 4–3, between 0.5 and 20 K km s⁻¹ at intervals of 1.5 K km s⁻¹ for HOPS 405 CO J = 3–2, between 1 and 20 K km s⁻¹ at intervals of 1.5 K km s⁻¹ for HOPS 405 J = 4–3, between 2 and 30 K km s⁻¹ at intervals of 4 K km s⁻¹ for HOPS 407 CO J = 3–2, between 2 and 30 K km s⁻¹ at intervals of 5 K km s⁻¹ for HOPS 407 CO J = 4–3, between 0.5 and 12 K km s⁻¹ at intervals of 1.5 K km s⁻¹ for HOPS 404 CO J = 3–2.