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Table 3:

Properties of the IRDCs. For every cloud the first line corresponds to the total mass, the following to the masses of separate millimeter sources.

Name
RA Dec. D Peak Flux density Integrated Flux density Mass 1.2 mm N (1.2 mm)1 N0 (1.2 mm)2 Mass (8 $\mu $m) N (8 $\mu $m)
  (J2000.0) (J2000.0) (kpc) (mJy) (Jy) ($M_\odot$) (1022 cm -2) (1022 cm -2) ($M_\odot$) (1022 cm -2)

IRDC 308.12-0.33
13 37 01.2 -62 44 40 4.32 225 1.88 580 1.7 60.3 $\rm 520^{+40}_{-30}$ $\rm 2.8^{+0.16}_{-0.16}$
IRDC 309.13-0.15 13 45 17.1 -62 21 57 3.92 3303 4.393 11503 2.63   $\rm 1750^{+370}_{-310}$ $\rm 3.0^{+0.13}_{-0.13}$
P1       162 1.37 360 1.3 41.9    
P2       124 0.96 250 0.9      
IRDC 309.34-0.64 13 48 39.8 -62 47 26 3.46 5043 3.693 7503 3.93   $\rm 750^{+170}_{-150}$ $\rm 3.1^{+0.24}_{-0.24}$
P1       216 0.94 190 1.7 48.5    
P2       155 0.81 170 1.3      
IRDC 310.39-0.28 13 56 01.7 -62 14 27 4.93 594 2.48 1029 4.6 186.1 $\rm 1320^{+60}_{-50}$ $\rm 2.6^{+0.16}_{-0.16}$
IRDC 312.33-0.07 14 11 56.8 -61 29 25 4.05 288 0.77 210 2.3 76.6 $\rm 290^{+100}_{-60}$ $\rm 2.7^{+0.33}_{-0.16}$
P1       288 0.46 130 2.3      
P2       92 0.31 90 0.7      
IRDC 313.72-0.29 14 23 05.4 -61 14 48 3.33 172 1.98 370 1.3 35.7 $\rm 700^{+90}_{-70}$ $\rm 4.1^{+0.16}_{-0.16}$
IRDC 316.45-0.66 14 44 50.4 -60 30 54 3.01 159 0.96 150 1.3 32.3 $\rm 430^{+80}_{-70}$ $\rm 2.9^{+0.16}_{-0.16}$
P1       159 0.58 90 1.3      
IRDC 317.71+0.11 14 51 07.5 -59 16 11 2.9 9543 8.003 11503 7.53   $\rm 1320^{+150}_{-150}$ $\rm 3.6^{+0.15}_{-0.15}$
P1       250 1.98 280 2.0 47.9    
IRDC 318.13-0.34 14 55 58.4 -59 28 31 2.96 142 2.48 370 1.1 26.9 $\rm 680^{+160}_{-140}$ $\rm 2.1^{+0.16}_{-0.16}$
P1       142 1.02 150 1.1      
IRDC 320.23+0.32 15 07 56.7 -57 54 27 1.97 186 1.68 110 1.5 24.6 $\rm 600^{+320}_{-250}$ $\rm 5.2^{+0.16}_{-0.16}$
P1       142 1.00 70 1.1      
P2       186 0.68 50 1.5      
IRDC 321.71+0.07 15 18 26.7 -57 21 56 2.14 408 3.12 240 3.2 56.9 460 $\rm ^{+80}_{-80}$ $\rm 5.4^{+0.16}_{-0.23}$
P1       276 1.69 130 2.2      
P2       408 1.43 110 3.2      
IRDC 013.84-0.49 18 17 21.2 -17 09 23 2.66 438 9.38 1130 3.5 77.0 $\rm 1150^{+130}_{-120}$ $\rm 3.3^{+0.13}_{-0.13}$
P1       214 2.97 360 1.6      
P2       163 1.12 130 1.3      
P3       192 1.45 170 1.5      
P4       438 3.54 430 3.5      
1 Peak column density per beam.

2 Extrapolated column density, obtained by applying the correction factor explained in Sect. 4.3.2

3 This mm peak corresponds to a mid-infrared bright source near to the IRDC.


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