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Table 3.

Properties of nearby molecular clouds.

Cloud Dist.a Lengthb SFR Mcloudc Mdensec ΣSFR Σgas tffd Δva tcrosse
(pc) (pc) (M⊙ Myr−1) (M⊙) (M⊙) (M⊙ Myr−1 pc−2) (M⊙ pc−2) (Myr) (km s−1) (Myr)
Aquila 260 ± 55 22.05 ± 4.66 105.00 ± 5.12 32160 ± 14411 19507.4 ± 8734.9 0.52 ± 0.22 160.03 ± 4.00 2.10 ± 0.22 3.00 7.70 ± 2.82
AurigaN 450 ± 23 26.11 ± 1.33 1.25 ± 0.56 1813 ± 360 200.2 ± 41.0 0.06 ± 0.03 92.91 ± 8.97 1.54 ± 0.08 1.70 4.23 ± 1.29
Auriga 450 ± 23 49.67 ± 2.54 26.25 ± 2.56 8965 ± 1778 1215.7 ± 239.6 0.28 ± 0.04 95.61 ± 9.19 2.25 ± 0.12 1.70 9.28 ± 2.82
Cepheus1 300 ± 34 7.65 ± 0.87 7.75 ± 1.39 495 ± 180 211.0 ± 76.6 1.90 ± 0.55 121.13 ± 16.62 0.91 ± 0.08 1.90 1.73 ± 0.56
Cepheus3 288 ± 25 4.35 ± 0.38 6.75 ± 1.30 342 ± 98 94.0 ± 26.3 2.24 ± 0.58 113.40 ± 12.80 0.88 ± 0.06 1.60 1.77 ± 0.55
Cepheus5 200 ± 66 3.78 ± 1.25 2.25 ± 0.75 214 ± 177 51.6 ± 44.3 1.15 ± 0.85 109.83 ± 18.58 0.80 ± 0.15 1.60 1.42 ± 0.63
ChaIII 150 ± 15 6.89 ± 0.69 0.25 ± 0.25 284 ± 82 16.2 ± 4.5 0.08 ± 0.08 87.58 ± 7.93 1.01 ± 0.07 1.10 2.67 ± 0.84
ChaII 178 ± 18 5.77 ± 0.58 4.25 ± 1.03 537 ± 151 160.3 ± 45.4 0.87 ± 0.28 110.70 ± 8.77 1.00 ± 0.06 1.20 2.99 ± 0.95
ChaI 150 ± 15 4.33 ± 0.43 15.25 ± 1.95 694 ± 196 323.9 ± 91.5 2.86 ± 0.68 130.25 ± 10.82 0.94 ± 0.06 0.85 4.42 ± 1.40
CoronaAus. 130 ± 11 3.46 ± 0.29 8.00 ± 1.41 329 ± 82 190.9 ± 49.6 3.51 ± 0.86 144.57 ± 11.88 0.72 ± 0.04 1.50 1.64 ± 0.51
IC5146E 950 ± 80 8.76 ± 0.74 17.25 ± 2.08 1869 ± 417 124.0 ± 27.3 0.87 ± 0.18 94.81 ± 5.22 1.53 ± 0.08 2.45 2.95 ± 0.92
IC5146NW 950 ± 80 16.99 ± 1.43 7.50 ± 1.37 5249 ± 1251 1330.9 ± 329.9 0.15 ± 0.04 102.09 ± 7.14 1.87 ± 0.10 2.04 5.72 ± 1.78
LupusIII 200 ± 40 7.11 ± 1.42 6.00 ± 1.22 400 ± 178 111.3 ± 49.8 1.55 ± 0.70 103.37 ± 4.84 0.98 ± 0.10 2.11 1.52 ± 0.55
LupusIV 150 ± 40 4.13 ± 1.10 1.00 ± 0.50 184 ± 107 70.7 ± 41.4 0.61 ± 0.45 112.70 ± 5.50 0.75 ± 0.10 1.53 1.36 ± 0.55
LupusI 150 ± 40 8.16 ± 2.18 2.50 ± 0.79 393 ± 238 93.1 ± 56.0 0.64 ± 0.40 100.37 ± 7.33 0.99 ± 0.14 2.17 1.49 ± 0.60
LupusVI 150 ± 40 6.73 ± 1.80 0.50 ± 0.35 216 ± 123 14.3 ± 8.1 0.18 ± 0.16 78.95 ± 2.85 1.02 ± 0.14 1.20 2.25 ± 0.90
LupusV 150 ± 40 5.02 ± 1.34 0.25 ± 0.25 181 ± 105 … 0.10 ± 0.12 75.45 ± 3.59 1.01 ± 0.14 1.20 2.11 ± 0.85
Musca 160 ± 60 7.46 ± 2.80 0.25 ± 0.25 166 ± 134 17.6 ± 14.0 0.15 ± 0.18 98.17 ± 5.56 0.81 ± 0.15 0.80 2.65 ± 1.27
OphNorth1 130 ± 20 1.92 ± 0.30 0.25 ± 0.25 51 ± 21 13.6 ± 5.7 0.51 ± 0.53 105.18 ± 10.87 0.58 ± 0.05 0.80 1.43 ± 0.48
OphNorth3 130 ± 20 8.15 ± 1.25 0.75 ± 0.43 225 ± 89 65.9 ± 26.2 0.36 ± 0.24 108.09 ± 9.75 0.82 ± 0.07 1.00 2.35 ± 0.79
OphNorth6 130 ± 20 2.25 ± 0.35 0.25 ± 0.25 73 ± 29 10.9 ± 4.3 0.33 ± 0.34 95.50 ± 9.17 0.68 ± 0.06 0.85 1.68 ± 0.57
Ophiuchus 125 ± 25 13.44 ± 2.69 59.00 ± 3.84 4020 ± 1862 1587.7 ± 741.6 1.78 ± 0.72 120.99 ± 7.66 1.54 ± 0.16 0.94 9.99 ± 3.60
Perseus 250 ± 30 26.70 ± 3.20 75.50 ± 4.34 4764 ± 1820 1896.2 ± 724.9 1.91 ± 0.47 120.56 ± 17.14 1.61 ± 0.15 1.54 6.65 ± 2.15
Serpens 429 ± 22 15.19 ± 0.78 43.00 ± 3.28 8846 ± 1173 6262.6 ± 839.9 0.87 ± 0.11 179.83 ± 5.42 1.40 ± 0.04 2.16 5.29 ± 1.61

Notes.

(a)

Distance and mean linewidth of each cloud are adopted directly from Evans et al. (2014).

(b)

We fit the region with AV >  3 mag in the extinction map with an ellipse for each cloud and use the major axis as the length of cloud.

(c)

The gas mass and dense gas mass of each cloud are obtained through integrating the extinction map down to AV = 3 mag (AV = 6 mag for Serpens) and down to AV = 7 mag, respectively.

(d)

The free-fall time is calculated based on the spherical assumption.

(e)

The crossing time of each cloud is obtained as tcross = size/Δv, where size is twice of equivalent radius r = sqrt(Area/π).

References. The distance uncertainties are adopted from following papers: Aquila (Straižys et al. 2003); AurigaN and Auriga (Lada et al. 2009); Cepheus 1, 3, and 5 (Kirk et al. 2009); Cham I and III (Belloche et al. 2011); Cham II (Whittet et al. 1997); CoronaAus. (Neuhäuser & Forbrich 2008); IC5146E and NW (Harvey et al. 2008); Lupus I, III-VI (Comerón 2008); Musca (Knude & Hog 1998; Franco 1991; Cox et al. 2016); Ophiuchus (de Geus et al. 1989); OphNorth1, 3, and 6 (Wilking et al. 2008; Hatchell et al. 2012); Perseus (Enoch et al. 2006); Serpens (Dzib et al. 2010, 2011).

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