Table 7
Source parameters assumed and resulting upper limits for E-propanimine, Z-propanimine, and methanimine in each set of observations.
| Source | Telescope |  |
Tbg(K) | ∆V (km s−1) | Tex (K) | E-C2H5CHNH NT (cm−2)(‡) | Z-C2H5CHNH NT (cm−2)(‡) | CH2NH NT (cm−2)(‡) | Refs. |
|---|---|---|---|---|---|---|---|---|---|
| Barnard 1 | IRAM | - | 2.7 | 0.8 | 10 | <2 (12) | <8 (11) | <5 (11) | 1, 2 |
| IRAS 4A | IRAM | – | 2.7 | 1.3 | 16.7 | <1 (13) | <3 (12) | 9 (11) | 1, 3, (*) |
| L1157B1 | IRAM | – | 2.7 | 8 | 60 | <1 (13) | <4 (12) | <2 (12) | 4 |
| L1157mm | IRAM | – | 2.7 | 3 | 60 | <8 (12) | <3 (12) | <1 (12) | 4 |
| L1448R2 | IRAM | – | 2.7 | 8 | 60 | <3 (13) | <1 (13) | <4 (12) | 5 |
| L1527 | IRAM | – | 2.7 | 0.5 | 12 | <1 (12) | <4(11) | <3 (11) | 5, 6 |
| L1544 | IRAM | – | 2.7 | 0.5 | 10 | <1 (12) | <3 (11) | <2 (12) | 7, 8 |
| SVS13A | IRAM | 0.3 | 2.7 | 3 | 80 | <2 (16) | <2 (16) | <3 (15) | 1, 3 |
| TMC1 | GBT, IRAM | – | 2.7 | 0.3 | 7 | <9 (11) | <3 (11) | <1 (12) | 9, 10 |
Notes. (t)Except where noted, the source is assumed to fill the beam. (‡)3σ upper limit to the column density, expressed as in Table 6 where x(y) means x × 10y. (*)Values for ∆V and Tex for E- and Z-propanimine were set to those determined for methanimine (see text).
References: [1] Melosso et al. (2018); [2] Cernicharo et al. (2018); [3] Higuchi et al. (2018); [4] McGuire et al. (2015); [5]Jørgensen et al. (2002); [6] Araki et al. (2017); [7] Hily-Blant et al. (2018); [8] Crapsi et al. (2005); [9] McGuire et al. (2018); [10] Gratier et al. (2016).
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