Back to the Abstract

	1 Introduction
	2 Imprints from primordial molecules on the CMB
	3 Recombination and the formation of molecules in the early universe
	4 The chemical network
	5 The numerical algorithm
	6 Results from the molecular network
	7 Effects of different species on the cosmic microwave background
	8 Discussion and outlook
	Appendix A: Free-free transitions involving H-
	Appendix B: Reaction rates
	References

	List of tables
	List of figures