Table 4
Derived upper limits to the column densities and abundances of other alcohols observed towards G+0.693.
| Species | Formula | Frequency (MHz) | QNs  |
Eu (K) | log I(300K) (nm2 MHz) | rms (mK) | N(a) (cm−2) | Abundance(b) |
|---|---|---|---|---|---|---|---|---|
| Cyclopropanol | c-C3H5OH (gauche) | 93 909.6309 | 33,0−22,1 | 8.3 | –5.5796 | 1.4 | ≤1.8 × 1013 | ≤1.4 × 10−10 |
| n-butanol (E conf.) | AGa-(E)-n-C4H9OH | 139 389.7073 | 66,1−55,0 | 22.2 | –5.1710 | 2.2 | ≤5.5 × 1012(c) | ≤4.1 × 10−11 |
| 139 389.7073 | 66,0−55,1 | 22.2 | –5.1710 | 2.2 | – | – | ||
| n-butanol (A conf.) | AGa-(A)-n-C4H9OH | 139 389.7685 | 66,1−55,0 | 22.2 | –5.1710 | 2.2 | ≤6.2 × 1012(c) | ≤4.6 × 10−11 |
| 139 389.7685 | 66,0−55,1 | 22.2 | –5.1710 | 2.2 | – | – |
Notes. (a)Upper limits to the column densities calculated assuming a Tex = 12.5 K, i.e. the same as the one derived for Aa-n-C3H7OH, and after fixing VLSR = 69 kms−1 and Δv = 20 kms−1 (see Sect. 3.1). (b)Abundances were derived considering a H2 column density of 1.35 × 1023 cm−2 (Martín et al. 2008). (c)Upper limits were obtained considering the two transitions shown in the Table, which appear blended in the spectra.
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