Table 8: Abundance ratio of ethane relative to acetylene derived in this work and for some comets (Dello Russo et al. 2001).
Comet Q(C₂H₆)/Q(C₂H₂)

Hale-Bopp (this work) 2.3 $\pm$ 1.0

Hale-Bopp 2.4 $\pm$ 0.7

C/1996 B2 $\sim$ 0.5-4

Hyakutake 4 $\pm$ 2

Lee 2.6 $\pm$ 0.3

C/1999 S4 Linear >0.9

**Table 8:** Abundance ratio of ethane relative to acetylene derived in this work and for some comets (Dello Russo et al. 2001).
Comet	Q(C₂H₆)/Q(C₂H₂)
Hale-Bopp (this work)	2.3 $\pm$ 1.0
Hale-Bopp	2.4 $\pm$ 0.7
C/1996 B2	$\sim$ 0.5-4
Hyakutake	4 $\pm$ 2
Lee	2.6 $\pm$ 0.3
C/1999 S4 Linear	>0.9

Source LaTeX | All tables | In the text

	1 Introduction
	2 The coma chemistry model
	3 Coma profiles used for the analysis
	4 The chemistry of possible C₂ and C₃ parents
	5 The main chemical reaction network for the formation of C₂ and C₃
	6 Model input: the nucleus - properties and composition
	7 Deriving the production rates
	8 Production rates for C₂H₂, C₂H₆ and C₃H₄
	9 Error discussion
	10 Abundance ratios relative to water and carbon monoxide
	11 Abundance ratios relative to acetylene
	12 Clues on the formation region of comet Hale-Bopp
	13 Summary
	References
	Online Material