Discovery of allenyl acetylene, H2CCCHCCH, in TMC-1 - A study of the isomers of C5H4

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Table A.2.

Observed line parameters for CH₃C₄H in TMC-1.

J_u	K	ν	^(a)	V_LSR^(b)	Δv^(c)	^(d)
		(MHz)	(mK km s⁻¹)	(km s⁻¹)	(km s⁻¹)	(mK)
8	2	32570.504	2.1 ± 0.5	5.80 ± 0.05	0.82 ± 0.11	2.4 ± 0.3
8	1	32571.457	30.8 ± 0.7	5.80 ± 0.02	0.74 ± 0.01	39.3 ± 0.3
8	0	32571.775	33.6 ± 0.7	5.80 ± 0.02	0.73 ± 0.01	42.8 ± 0.3
9	2	36641.764	2.8 ± 0.5	5.81 ± 0.03	0.79 ± 0.07	3.4 ± 0.3
9	1	36642.836	32.0 ± 0.7	5.79 ± 0.04	0.69 ± 0.01	43.8 ± 0.3
9	0	36643.194	33.9 ± 0.7	5.80 ± 0.02	0.69 ± 0.01	46.3 ± 0.3
10	2	40713.005	2.0 ± 0.5	5.78 ± 0.03	0.47 ± 0.08	3.9 ± 0.4
10	1	40714.197	31.9 ± 0.7	5.81 ± 0.02	0.57 ± 0.01	53.0 ± 0.4
10	0	40714.594	34.2 ± 0.7	5.80 ± 0.02	0.58 ± 0.01	55.2 ± 0.4
11	2	44784.226	2.2 ± 0.7	5.89 ± 0.05	0.61 ± 0.10	3.4 ± 0.5
11	1	44785.536	30.0 ± 0.8	5.79 ± 0.02	0.63 ± 0.01	44.5 ± 0.5
11	0	44785.973	30.9 ± 0.8	5.80 ± 0.02	0.60 ± 0.02	48.6 ± 0.5
12	2	48855.424	1.9 ± 0.6	5.85 ± 0.04	0.44 ± 0.07	4.1 ± 0.6
12	1	48856.853	23.8 ± 0.8	5.80 ± 0.02	0.57 ± 0.01	39.1 ± 0.6
12	0	48857.330	27.1 ± 0.8	5.80 ± 0.02	0.58 ± 0.01	44.2 ± 0.6

Notes.

^(a)

Observed frequency assuming a v_LSR of 5.83 km s⁻¹.

^(b)

Local standard of rest velocity of the line in km s⁻¹.

^(c)

Integrated line intensity in mK km s⁻¹.

^(d)

Linewidth at half intensity derived by fitting a Gaussian function to the observed line profile (in km s⁻¹).

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