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Table 5.

Properties of SPT0311-58 clumps identified in the ALMA rest-frame 160 μm continuum image.

Region F1000W clump Mdyn Mgas SFR[CII] M*[50–100 Myr] Mdyn/M* Mgas/M* sSFR
(109 M) (109 M) (M yr−1) (109 M) (Gyr−1)
(1) (2) (3) (4) (5) (6) (7) (8) (9)
E2 EA 14 12 250 4.2±1.8 3.5 2.8±1.2 60
E3 EB+EC 9 10 230 9.3±2.5 1.0 1.1±0.3 25
W4 WA 9 68 140 3.2±1.5 2.7 22±10 44
W5+W6 WC+WD 18 56 300 8.5±2.2 2.2 6.6±1.7 35
E* galaxy 40 28 770 19.9±3.6 2.0 1.4±0.3 39
W* galaxy 72 227 1760 14.8±2.9 4.9 15±3 119

Notes. Column (1) displays the [C II]158 μm regions considered to compute the parameters. E* and W* represent the sum of all the [C II] clumps for each galaxy. Column (2) shows the clump correspondence between the regions identified in the ALMA rest-frame 160 μm and MIRIM F1000W images. The last two rows represent the total values for each galaxy, derived by summing all the clumps. Columns. (3)–(5) give the intrinsic dynamical, gas masses, and SFR derived from the [C II]158 μm ALMA spectral imaging (Spilker et al. 2022). Column (6) gives the extinction-corrected stellar masses derived from the MIRI F1000W imaging for a 50–100 Myr constant star formation presented in Table 4. Considering stellar populations created by a constant star formation of ∼10 Myr or instantaneous burst of 200–400 Myr would yield M* different by a factor of ∼0.33 and ∼6.5, respectively. Columns. (7) and (8) show the ratio between the stellar mass computed in this work and the dynamical and gas masses derived from the [C II]. Column (9) displays the sSFR (SFR/M*) derived using the SFR values computed by Spilker et al. (2022).

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