Laboratory characterization and astrophysical detection of vibrationally excited states of vinyl cyanide in Orion-KL

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Volume 572 (December 2014)

A&A, 572 (2014) A44

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Table 1

Spectroscopic data sets for excited vibrational states of CH₂CHCN acquired in this work.

Excited state	E _vib ^a	ΔE ^b	N _fitted ^c	N _unfitted ^d	σ _fit ^e	σ _rms ^f	J range	K_a range	Frequency range^g
	(cm^-1)	(cm^-1)			(MHz)				(GHz)

ν₁₀	560.5	0	2135^h	55	0.324	1.446	2–99	0–22	37.0–1893.4
ν₁₁ν₁₅	562.9	2.391494(5)	1837^h	136	0.382	1.872	3–100	0–20	39.0–1783.5
2ν₁₅	663.5	0	1329ⁱ	52	0.265	1.980	1–70	0–17	18.6–1191.3
ν₁₄	681.8	18.31812(2)	1287ⁱ	53	0.228	1.467	5–70	0–18	58.3–1891.1
3ν₁₁	686.6	23.16415(3)	1250ⁱ	81	0.309	2.329	2–69	0–17	28.0–1196.5
ν₁₀ν₁₁	787.5	0	842^j	3	0.137	1.289	3–68	0–12	37.1–639.3
2ν₁₁ν₁₅	793.9	6.44502(3)	860^j	7	0.164	1.551	3–69	0–12	37.3–640.0

ν₉	869.0		373	7	0.167	1.665	1–63	0–7	18.5–570.3
4ν₁₁	916.7		225	17	0.250	2.496	3–43	0–5	37.4–410.9

Notes.

^(a)

Estimated vibrational energy (see text in Sect. 3.2).

^(b)

Energy difference relative to the lowest level in the relevant polyad obtained from the perturbation analysis.

^(c)

The number of distinct frequency fitted lines.

^(d)

The number of confidently assigned lines rejected from the fit at the 10σ cutoff criterion.

^(e)

Deviation of fit for the vibrational subset.

^(f)

Unitless deviation of fit for the vibrational subset.

^(g)

Frequency coverage of transitions in the data set.

^(h,i,j)

Transitions fitted jointly in a single fit accounting for interstate perturbations.

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