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Table 2

Absolute extraction thresholds and numbers of extracted filaments.

Field PT RT
(1021 cm−2) # #
(1) (2) (3) (4) (5) (6)
IC5146 0.66 0.17 1.00 67 59
Orion B 0.72 0.17 1.09 410 234
Aquila 2.71 0.20 4.06 137 71
Musca 0.86 0.09 1.28 47 10
Polaris 0.56 0.17 0.84 32 20
Pipe 0.83 0.12 1.24 148 38
Taurus L1495 0.92 0.07 1.38 266 110
Ophiuchus 0.99 0.01 1.48 204 57

All 1310 599

Notes. Column 1: field name. Column 2: minimum background column density in each field (see Sect. 2.3). Column 3: persistence threshold used in DisPerSE corresponding to the minimum rms level of the background column density fluctuations in each field. Column 4: robustness threshold used in DisPerSE, corresponding to 1.5, where is the minimum background column density in each field. Column 5: total number of filaments extracted in each field following the procedure explained in Sect. 2.2. Column 6: number of selected filaments with AR > 3 and column density threshold C0 > 0.3 in each field (see Sect. 3.5).

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