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Table 1.

SiC6 lines and the spectral features near them, as modeled in Figure 2 with H from Equation (1) fixed to 0.3 and vend = 14.5 kms−1.

Molecule μ Transition νul Eup Line W (mK⋅
(Debye) ID (MHz) (K) Str.(S) km⋅s−1)
U31779 31778.709 4.573
SiC6 8.220 J = 26→25 31784.664 20.60 26.00 24.500
C10H− 15.200 J = 53→52 31785.863 41.20 53.00 63.157
C4H ν7 = 1 2.100 see [1] 31786.650 247.10 2.39 41.758
SiC6 8.220 J = 27→26 33007.120 22.20 27.00 27.754
U33008 33008.406 5.471
U33010 33010.335 3.649
SiC6 8.220 J = 28→27 34229.572 23.80 28.00 28.047
H13CCC15N 3.732 J = 4→3 34233.231 4.10 4.00 8.319
CH3C5N 5.400 J = 220→210 34233.376 18.90 22.00 7.577
U35441 35440.971 9.568
HC9N 5.200 J = 61→60 35442.454 52.70 61.00 143.684
SiC6 8.220 J = 29→28 35452.020 25.50 29.00 22.721
U35453 35452.518 8.466
l-HC4N 4.330 NJ = 87 → 76 36666.112 8.40 6.91 26.789
SiC6 8.220 J = 30→29 36674.464 27.30 30.00 17.271
HC9N ν19 = 3 5.200 JL = 65−1→64−1 37888.364 276.60 65.00 14.666
C13CCCH 2.100 see [2] 37896.002 4.50 2.29 9.480
SiC6 8.220 J = 31→30 37896.904 29.10 31.00 19.114
HC13CC5N 4.820 J = 34→33 37897.938 31.80 34.00 28.044
CH2CHCNa 3.821 JK, k = 40, 4→30, 3 37904.851 4.50 4.00 29.085
U37907 37906.800 11.841
U40332 40332.097 37.223
U40335 40335.000 10.764
SiC6 8.220 J = 33→32 40341.773 32.90 33.00 25.301
MgC5N 7.300 NJ = 35 69 2 → $ _{\frac{69}{2}} \rightarrow $34 67 2 $ _{\frac{67}{2}} $ 40348.015 34.90 34.50 53.699
MgC5N 7.300 NJ = 35 71 2 → $ _{\frac{71}{2}} \rightarrow $34 69 2 $ _{\frac{69}{2}} $ 40349.822 34.90 35.50 43.479
U41559 41558.500 8.209
SiC6 8.220 J = 34→33 41564.200 34.90 34.00 20.054
HCC13CC4N 4.820 J = 37→36 41564.473 37.90 37.00 30.450
U41567 41567.000 7.111
HC4C13CCN 4.820 J = 37→36 41574.391 37.90 37.00 41.439
HC5N ν11 = 2 4.330 J = 16→15 42780.600 325.70 48.00 63.374
SiC6 8.220 J = 35→34 42786.623 37.00 35.00 19.810
U42788 42787.655 26.468
H13CCC15N 3.732 J = 5→4 42791.453 6.20 5.00 20.019
U42794 42794.200 18.733
C8H2Π3/2 6.500 J = 75 2 → 73 2 $ \frac{75}{2}\rightarrow\frac{73}{2} $ a 1 43999.034 40.50 74.90 58.626
C8H2Π3/2 6.500 J = 75 2 → 73 2 $ \frac{75}{2}\rightarrow\frac{73}{2} $ b 43999.793 40.50 74.90 57.243
HCC13C15N 3.732 J = 5→4 44007.159 6.30 5.00 6.288
SiC6 8.220 J = 36→35 44009.042 39.10 36.00 16.118
HCC13CCCN 4.330 J = 17→16 45217.843 19.50 17.00 252.488
HCCC13CCN 4.330 J = 17→16 45223.345 19.50 17.00 244.703
SiC6 8.220 J = 37→36 45231.455 41.20 37.00 19.149
H13CC6N 4.820 J = 41→40 45233.690 45.60 41.00 21.366
C7H2Π3/2 5.945 J,= 53 2 → 51 2 $ \frac{53}{2}\rightarrow\frac{51}{2} $ 46452.599 68.20 106.00 86.785
SiC6 8.220 J = 38→37 46453.864 43.50 38.00 18.668
HC7N ν15 = 3 4.820 JL = 40−3→39−3 46466.395 315.50 40.80 3.494
HC7N ν15 = 3 4.820 JL = 403→393 46466.591 315.50 40.80 3.494
SiC6 8.220 J = 39→38 47676.268 45.80 39.00 23.017
S3 J = 81 2 → 79 2 $ \frac{81}{2}\rightarrow\frac{79}{2} $ 47683.300 24.534
U47691 47691.450 23.674
S4 J = 83 2 → 81 2 $ \frac{83}{2}\rightarrow\frac{81}{2} $ 48883.000 14.165
SiC6 8.220 J = 40→39 48898.666 48.10 40.00 17.244

Notes. The area of the line W in mK⋅kms−1 is derived from the only free parameter for each line in the fit which is the integrated intensity A in Equation (1). S3 and S4 are the unknown carriers of two series of lines identified in the data to which even the quantum numbers can be assigned. Other unidentified lines are labeled as UXXXXX with the rounded value in MHz from their central frequencies. [1] (N,P,J,F) = (3,1,7/2,3)→(2,–1,5/2,2)

[2] (N,J)f, F = (4,7/2)3, 5/2→(3,5/2)2, 3/2.

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