Table 1.
ALPINE molecular gas depletion timescales and molecular gas fractions in two redshift bins.
| 4.4 < z < 4.6 |
5.1 < z < 5.9 |
|||
|---|---|---|---|---|
| means | std | means | std | |
| tdepl from [C II] detections | 5.9 ± 0.7 | 3.1 | 4.6 ± 0.8 | 3.5 |
| tdepl from [C II] detections+limits (survival analysis) | 2.3 ± 0.3 | 2.6 | 2.3 ± 0.4 | 1.6 |
| tdepl from dynamical masses ( † ) | 9.8 ± 3.5 | 5.9 | 4.4 ± 1.5 | 3.4 |
| tdepl from [C II] detections (for the same sub-sample as in ( † )) | 7.7 ± 1.2 | 3.7 | 4.3 ± 0.9 | 2.1 |
| fmolgas from [C II] detections | 0.67 ± 0.03 | 0.12 | 0.61 ± 0.05 | 0.23 |
| fmolgas from [C II] detections+limits (survival analysis) | 0.46 ± 0.05 | 0.52 | 0.46 ± 0.05 | 0.34 |
Notes. tdepl means and standard deviations (std) are in 108 yr. The “detections” refer to the 44 ALPINE [C II]-detected nonmerger galaxies and the “limits” to the secure 3σ upper limits of the 43 [C II]-nondetected galaxies (see Sect. 2). The “dynamical masses” refer to the 17 ALPINE nonmerger galaxies with molecular gas masses inferred from dynamical masses (see Sect. 3.2.3). ( † )The dag refers to the sample of “tdepl from dynamical masses”. It is there to refer to this sample.
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