Table 2.
Gas properties of the two SBs and two MSs.
SB1 | SB2 | MS1 | MS2 | |
---|---|---|---|---|
(a)αCO(Z) (M⊙/(K km s−1 pc2)) | 4.09 | 4.10 | 4.06 | 4.06 |
(b)Mgas, CO (1010 M⊙) | 20.2 ± 1.7 | 13.3 ± 1.4 | 9.2 ± 0.9 | 7.4 ± 1.1 |
(c)fgas, CO | 0.70![]() |
0.66![]() |
0.29![]() |
0.25![]() |
(d)tdep, CO (Gyr) | 0.15 ± 0.02 | 0.18 ± 0.08 | 0.32 ± 0.14 | 0.25 ± 0.15 |
(e)δGDR | 126 ± 16 | 123 ± 28 | 110 ± 65 | 171 ± 47 |
(f)Mgas, GDR (1010 M⊙) | 17.9 ± 6.4 | 12.8 ± 5.1 | 7.6 ± 5.1 | 4.0 ± 1.7 |
fgas, GDR | 0.68![]() |
0.65![]() |
0.25![]() |
0.15![]() |
tdep, GDR (Gyr) | 0.14 ± 0.05 | 0.17 ± 0.10 | 0.26 ± 0.21 | 0.13 ± 0.10 |
(g)Mgas, 3.2mm (1010 M⊙) | 22.7 ± 6.4 | 10.4 ± 3.9 | 17.1 ± 5.5 | 5.1 ± 1.6 |
fgas, 3.2mm | 0.73![]() |
0.61![]() |
0.43![]() |
0.18![]() |
tdep, 3.2mm (Gyr) | 0.17 ± 0.05 | 0.14 ± 0.08 | 0.59 ± 0.32 | 0.17 ± 0.11 |
Notes. The molecular gas masses are estimated based on the CO(1−0) emission line using metallicity-dependent conversion factors, gas-to-dust ratio, and 3.2mm dust continuum emission.
CO-to-H2 conversion factor (αCO(Z)) from W18, calculated based on the mass-metallicity relation.
Gas depletion time: tdep = Mgas/SFR, which is the inverse of the star formation efficiency (SFE =1/tdep).
Gas-to-dust mass ratio, computed based on the δGDR − Z relation (Eq. (2)).
Mgas, GDR, computed based on the gas-to-dust ratio (Eq. (1)).
Mgas, 3.2mm, computed based on the Rayleigh-Jeans tail dust continuum (Eq. (4)).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.