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Table 4

List of ten spectral features grouping transitions of 2-aminoproprionitrile observed toward Sgr B2(N).

Fa Sb Nc Transition Frequency Unc.d Ele S μ2 σf τg Iobsh Imodh Iallh Comments
(MHz) (kHz) (K) (D2) (mK) (K km s-1) (K km s-1)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14)
F1 t 11 133,11–123,10 88137.062 1 28 126.3 19 0.05 0.08(08) 0.18 0.00 Candidate detected line
F2 c 17 150,15–141,14 90722.899 2 31 0.5 14 0.13 -0.23(06) 0.47 -0.11 Group issue, blend with HNC in
absorption?
– – 18 1610,7–169,7 90723.222 6 65 0.9 – – – – – –
– – 19 1610,6–169,7 90723.250 6 65 0.2 – – – – – –
– – 20 151,15–141,14 90723.297 2 31 154.7 – – – – – –
– – 21 150,15–140,14 90723.819 2 31 154.7 – – – – – –
– – 22 1610,7–169,8 90724.147 6 65 0.2 – – – – – –
– – 23 1610,6–169,8 90724.176 6 65 0.9 – – – – – –
– – 24 151,15–140,14 90724.217 2 31 0.5 – – – – – –
F3 t 56 149,6–139,5 98328.023 1 49 86.1 18 0.07 0.16(07) 0.28 0.01 Candidate detected group,
uncertain baseline
– – 57 149,5–139,4 98328.075 1 49 86.1 – – – – – –
F4 t 72 162,15–152,14 101362.165 2 39 161.0 16 0.07 0.16(06) 0.31 0.09 Candidate detected line, uncertain
baseline
F5 c 85 1511,5–1411,4 105091.282 1 63 72.7 28 0.05 0.35(10) 0.25 0.11 Group issue, blend with U-line and
C2H3CN, ν11 = 2, uncertain baseline
– – 86 1511,4–1411,3 105091.282 1 63 72.7 – – – – – –
F6 t 89 159,7–149,6 105505.313 1 54 100.7 37 0.08 0.83(14) 0.38 0.13 Candidate detected line, noisy
– – 90 159,6–149,5 105505.510 1 54 100.7 – – – – – –
F7 t 93 163,14–153,13 106119.548 2 42 157.5 25 0.07 0.06(09) 0.34 0.28 Candidate detected line, noisy
F8 c 106 368,28–368,29 108387.475 5 241 24.2 48 0.17 2.53(19) 0.81 4.13 Group issue?, blend with
CH3C(O)CH3, 13CH3OH, and
C2H5OH
– – 107 180,18–171,17 108389.721 2 45 0.6 – – – – – –
– – 108 181,18–171,17 108389.752 2 45 186.0 – – – – – –
– – 109 180,18–170,17 108389.794 2 45 186.0 – – – – – –
– – 110 181,18–170,17 108389.825 2 45 0.6 – – – – – –
F9 t 119 173,15–163,14 112029.767 2 47 167.8 29 0.08 0.89(09) 0.39 0.02 Candidate detected line, partial
blend with U-line
F10 c 126 1610,7–1510,6 112426.272 1 63 102.3 31 0.08 0.81(11) 0.42 0.48 Group issue?, noisy, partial blend
with t-HCOOH and C2H5CN
– – 127 1610,6–1510,5 112426.294 1 63 102.3 – – – – – –

Notes. The ten spectral features group the transitions of 2-aminoproprionitrile that have been observed toward Sgr B2(N) with the IRAM 30 m telescope and are predicted to be strong enough ( > 20 mK) and are not strongly blended with lines of other species according to our LTE modeling.

(a)

Numbering of the 2-aminopropionitrile features as in Fig. 2. The dashes indicate the transitions associated with the same feature.

(b)

Status of each feature: “t” stands for tentative detection and “c” for possible conflict between the observed and modeled spectra.

(c)

Numbering of the transitions associated with a modeled feature stronger than 20 mK (see Table C.1).

(d)

Frequency uncertainty.

(e)

Lower energy level in temperature units (El / kB).

(f)

Calculated rms noise level in Tmb scale.

(g)

Peak opacity of the modeled feature.

(h)

Integrated intensity in Tmb scale for the observed spectrum (Col. 11), the 2-aminopropionitrile model (Col. 12), and the model including all molecules detected so far except for 2-aminopropionitrile (Col. 13). The uncertainty in Col. 11 is given in parentheses in units of the last digit.

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