Table 1
Summary of the IRAM 30 m and HIFI detections of C2H.
| Instrument | η MB | HPBW | Int. time | Noise | Δν | Δν | CCH | Freq. range |
|
|
| or band | (′′) | (min) | (mK) | (MHz) | (km s-1) | transition | (MHz) | (K MHz) | ||
|
|
||||||||||
| IRAM 30 m | ||||||||||
| A100/B100 | 0.82 | 28.2 | 614 | 2.5 | 1.0 | 3.4 | N = 1−0 | |||
| J = 3/2−1/2 | 87278.2−87339.6 | 15.90 | ||||||||
| J = 1/2−1/2 | 87392.8−87453.6 | 7.58 | ||||||||
| C150/D150 | 0.68 | 14.1 | 215 | 10 | 1.0 | 1.7 | N = 2−1 | |||
| J = 5/2−3/2 | 174621.1−174682.5 | 58.73 | ||||||||
| J = 3/2−1/2 | 174708.2−174744.9 | 38.09 | ||||||||
| J = 3/2−3/2 | 174796.2−174863.7 | 5.90 | ||||||||
| E3 | 0.57 | 9.4 | 161 | 10 | 1.0 | 1.1 | N = 3−2 | |||
| J = 7/2−5/2 | 261974.3−262023.4 | 110.74 | ||||||||
| J = 5/2−3/2 | 262048.8−262084.4 | 60.63 | ||||||||
| J = 5/2−5/2 | 262191.3−262270.0 | 6.33 | ||||||||
| E3 | 0.35 | 7.0 | 79 | 5.3 | 2.0 | 1.7 | N = 4−3 | |||
| J = 9/2−7/2 | 349311.5−349368.3 | 66.98 | ||||||||
| J = 7/2−5/2 | 349368.3−349421.6 | 60.15 | ||||||||
| J = 7/2−7/2 | 349575.1−349671.8 | 2.35 | ||||||||
|
|
||||||||||
| Herschel /HIFI | ||||||||||
| 1a | 0.75 | 40.5 | 28 | 9.9 | 1.5 | 0.86 | N = 6−5 | |||
| J = 13/2−11/2 | 523941.9−524000.4 | 18.60 | ||||||||
| J = 11/2−9/2 | 524000.4−524061.9 | 18.74 | ||||||||
| J = 11/2−11/2 | − | − | ||||||||
| 1b | 0.75 | 34.7 | 13 | 7.4 | 0.50 | 0.25 | N = 7−6 | |||
| J = 15/2−13/2 | 611237.1−611301.6 | 10.09 | ||||||||
| J = 13/2−11/2 | 611301.6−611364.1 | 9.44 | ||||||||
| J = 13/2−13/2 | − | − | ||||||||
| 2a(†) | 0.75 | 30.4 | 12 | 13.7 | 4.5 | 1.8 | N = 8−7 | |||
| J = 17/2−15/2 | 698487.5−698619.0 | 4.21 | ||||||||
| J = 15/2−13/2 | 698619.0−698738.0 | 4.47 | ||||||||
| J = 15/2−15/2 | − | − | ||||||||
| 2b | 0.75 | 27.0 | 15 | 10 | 6.0 | 2.2 | N = 9−8 | |||
| J = 19/2−17/2 | 785750.0−785875.0‡ | 0.20‡ | ||||||||
| J = 17/2−15/2 | 785875.0−785900.0‡ | 0.20‡ | ||||||||
| J = 17/2−17/2 | − | − | ||||||||
Notes. Columns are, respectively, the instrument or band with which we
detected the C2H emission, the main-beam efficiency
ηMB, the half-power beam width HPBW, the integration
time, the noise level in the spectra, the frequency resolution Δν,
the velocity resolution Δν, the detected C2H rotational transitions, the
frequency range in which we observed the lines, and the frequency-integrated intensity
.
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