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Table A.2

Cloud property distribution statistics across regions and subsamples with cloud-to-spiral-arm association performed with R19 models

Full sample
Science sampleDist. lim. sample
SA IA SA IA
Property Units μ IQR μ IQR μ IQR μ IQR

log(Reff) pc 0.34 0.54 0.39 0.37 0.38 0.36 0.38 0.35
log(σv) km s−1 -0.11 0.32 -0.12 0.26 0.07 0.33 0.04 0.28
log(Mmol) M 3.06 1.18 3.17 0.81 3.19 0.82 3.29 0.87
log(Σmol) M pc−2 1.87 0.25 1.87 0.22 1.97 0.28 2.02 0.32
log(αvir) 0.16 0.45 0.04 0.38 0.27 0.47 0.21 0.42
log(AR) 1.01 0.32 0.96 0.32 1.19 0.26 1.15 0.30

ATLASGAL sample
Science sample Dist. lim. sample
SA IA SA IA
Property Units μ IQR μ IQR μ IQR μ IQR

log(Reff) pc 0.38 0.55 0.51 0.33 0.36 0.35 0.42 0.30
log(σv) km s−1 0.03 0.20 0.03 0.22 0.08 0.22 0.06 0.19
log(Mmol) M 3.26 1.07 3.57 0.69 3.19 0.62 3.37 0.56
log(Σmol) M pc−2 2.05 0.22 2.08 0.20 2.03 0.22 2.07 0.21
log(αvir) 0.23 0.55 0.05 0.40 0.29 0.45 0.25 0.37
log(AR) 1.06 0.31 1.01 0.33 1.17 0.29 1.09 0.30

HMSF sample
Science sample Dist. lim. sample
SA IA SA IA
Property Units μ IQR μ IQR μ IQR μ IQR

log(Reff) pc 0.61 0.49 0.64 0.34 0.62 0.31 0.59 0.30
log(σv) km s−1 0.23 0.24 0.16 0.25 0.23 0.23 0.21 0.24
log(Mmol) M 3.96 1.07 4.05 0.78 3.99 0.70 4.02 0.83
log(Σmol) M pc−2 2.18 0.28 2.23 0.26 2.23 0.28 2.29 0.26
log(αvir) 0.21 0.61 0.05 0.47 0.23 0.42 0.11 0.48
log(AR) 1.18 0.30 1.20 0.34 1.26 0.27 1.26 0.26

Notes. Median (μ) and inter-quartile range (IQR) of cloud property distributions (from top to bottom effective radius Reff, velocity dispersion σv, molecular gas mass Mmol, molecular gas mass surface density Σmol, virial parameter αvir, and aspect ratio AR) in the spiral arms (SA) with respect to the inter-arm regions (IA). The analysis is performed separately for the full sample, for the cloud sample that contains at least one ATLASGAL source, and for the cloud sample that contains clouds with a HMSF signpost; and their respective science and complete distance-limited subsamples.

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