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Table 1.

Observed line parameters in TMC-1.

Transition νcalc (MHz) (a) Eup (K) ∫ T A * dv $ \int T_A^* {\rm d}{\it v} $ (mK km s−1) (b)
Malononitrile, CH2(CN)2
90, 9–81, 8 36 556.623 11.9 0.63 ± 0.22 (c)
41, 4–30, 3 38 722.403 3.5 0.79 ± 0.22
100, 10–91, 9 43 001.377 14.6 1.07 ± 0.24
51, 5–40, 4 43 493.060 4.8 0.91 ± 0.23
Maleonitrile, (Z)-NC−CH=CH−CN
80, 8–71, 7 32 834.020 7.5 0.37 ± 0.24
81, 8–70, 7 33 839.817 7.5 − (d)
90, 9–81, 8 36 961.959 9.3 0.54 ± 0.06
91, 9–80, 8 37 542.932 9.3 0.50 ± 0.12
100, 10–91, 9 41 003.566 11.3 − (e)
101, 10–00, 9 41 330.441 11.3 0.33 ± 0.11
110, 11–101, 10 44 991.836 13.4 0.22 ± 0.11
111, 11–100, 10 45 172.060 13.4 − (e)

Notes.

(a)

Calculated frequency of the centroid of all hyperfine components.

(b)

Sum of the velocity-integrated areas of the various components that can be resolved (typically two or three; see Figs. 1 and 2), each fitted with a Gaussian.

(c)

Lower limit because intensity is reduced by the overlap of a frequency-switching negative artifact.

(d)

Line is only marginally detected. No fit is attempted.

(e)

Line is blended with a strong line. No fit is attempted.

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