Table 11: Summary of processes predicted to be involved in the formation of each molecule.

Molecule	high mass YSOs	low-mass YSOs
CN	FUV cavity walls	X-rays
	X-rays
NO	X-rays	X-rays
	FUV cavity walls
SO+	FUV cavity walls	X-rays
	X-rays
CO+	FUV cavity walls	inner region X-rays
		inner region FUV