Table A.4
Spectroscopic information of the transitions of hydroxyacetone detected toward G+0.693-0.027, shown in Figure 4.
| Frequency (GHz) |
Transition(a) | log I (300 K) (nm2 MHz) |
Eup (K) |
Blending |
|---|---|---|---|---|
| 34.06171 (10) | 51,5–40,4 (A) | −5.9719 | 4.7 | Unblended |
| 35.10788 (10) | 60,6–51,5 (A) | −5.8670 | 6.4 | Slightly blended: H13CC13CN |
| 36.6000352 (10) | 63,4–62,5 (A) | −5.9821 | 9.7 | Blended: CH3C(O)OCH3 |
| 36.62067 (10) | 61,6–51,5 (A) | −5.9796 | 9.7 | Blended: U-line * |
| 37.44757 (10) | 60,6–50,5 (A) | −5.9551 | 6.4 | Unblended |
| 38.96035 (10) | 61,6–50,5 (A) | −5.7582 | 9.7 | Blended: cis-CH3OCHO |
| 41.0700049 (58) | 62,4–52,3 (E) | −5.9122 | 11.3 | Slightly blended: U-line |
| 41.0755430 (35) | 62,5–52,4 (E) | −5.9617 | 10.5 | Slightly blended: U-line |
| 42.5091837 (15) | 71,7–61,6 (A) | −5.7830 | 8.5 | Slightly blended: g-C2H5OCHO |
| 42.5817854 (29) | 71,7–61,6 (E) | −5.8027 | 11.3 | Blended: U-line * |
| 43.0928962 (15) | 70,7–60,6 (A) | −5.7689 | 8.5 | Unblended |
| 44.0219474 (21) | 71,7–60,6 (A) | −5.5687 | 8.5 | Blended: Aa-n-C3H7OH |
| 44.808245 (47) | 94,5–93,6 (A) | −5.6091 | 19.8 | Unblended |
| 46.0448088 (31) | 72,6–62,5 (A) | −5.7438 | 10.2 | Unblended |
| 47.7984158 (16) | 80,8–71,7 (A) | −5.4297 | 10.8 | Unblended |
Notes. (a)The rotational energy levels are labeled using the conventional notation for asymmetric tops: JKa,Kc. Numbers in parentheses represent the predicted uncertainty associated to the last digits. The A and E labels refer to the A- and E- symmetry states of hydroxyacetone, arising due to the presence of a methyl internal rotation motion. Transitions that were not used in the AUTOFIT owing to a non-negligible contamination with a U-line are flagged with an asterisk (*).
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