Complex organic molecules in comets C/2012 F6 (Lemmon) and C/2013 R1 (Lovejoy): detection of ethylene glycol and formamide

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Volume 566 (June 2014)

A&A, 566 (2014) L5

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Table 5

Observed lines and production rate of formamide.

Transition	Frequency	Lemmon 6–8 Apr.			Lovejoy 8–12 Nov.			Lovejoy 27–31 Nov.			Lovejoy 9–16 Dec.
	[MHz]	[mK km s^-1]^a		Q	[mK km s^-1]^a		Q	[mK km s^-1]^a		Q	[mK km s^-1]^a		Q
		Model^a	Obs.	[10²⁵ s^-1]	Model^a	Obs.	[10²⁵ s^-1]	Model^a	Obs.	[10²⁵ s^-1]	Model^a	Obs.	[10²⁵ s^-1]


11_1,11−10_1,10	223452.51				161.2			124.8			53.8
11_0,11−10_0,10	227605.66				151.7				38 ± 12		56.9
11_2,10−10_2,9	232273.65				134.4	<32		111.2		3.2 ± 1.0	51.7	17 ± 5
11_2,9−10_2,8	237896.68				139.9		<6.4				54.4		3.0 ± 0.9
11_1,10−10_1,9	239951.80				164.1						60.8

12_1,12−11_1,11	243521.04	16.7			156.4			124.2			65.6
12_0,12−11_0,11	247390.72	17.4			163.8			129.8			68.3
12_2,11−11_2,10	253165.79	15.7	24 ± 7		136.7	34 ± 8		112.6	21 ± 4		61.9	16 ± 5
12_2,10−11_2,9	260189.09	17.1		14 ± 4	140.8		2.2 ± 0.5	116.5		1.7 ± 0.3	64.3		2.4 ± 0.7
12_1,11−11_1,10	261327.45	18.7			164.0			132.6			71.5

13_1,13−12_1,12	263542.24	19.2	<54		156.9	<42		127.2	22 ± 8		69.9	<24
13_0,13−12_0,12	267062.61	19.0		<28	165.5		<2.6	133.7		1.7 ± 0.6	73.3		<3.4

Notes.

^(a)

Line intensities modelled with Q_NH₂CHO = 10²⁶ molec. s^-1 and photodissociation rates at 1 AU β₀ = 1 × 10^-4 s^-1.

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