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Table 3

Star-forming region parameters.

B68 IRDC19175 IRDC18310-4

Mass [M] 3.1 87 800–1600

Av. dens. [cm-3] 1.2 × 104 2.6 × 105 2.5 × 105
Size [AU] 45 000 48 000 51 000
Jeans length2 [AU] 44 000 10 000 10 000
Jeans mass2 [M] 1.7 0.36 0.37

Core dens. [cm-3] 1 6.0 × 105 1.5 × 106
Jeans length2 [AU] 1 6000 4000
Jeans mass2 [M] 1 0.24 0.15

Notes.

(1)

B68 as a whole is already the core.

(2)

At 15 K.

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