PHANGS-JWST: The largest extragalactic molecular cloud catalog traced by polycyclic aromatic hydrocarbon emission

Open Access

Table 2.

Summary of PAH cloud properties in various galactic environments.

Property	Statistic	Global	Bar	Spiral Arm	Interarm	Disk
N_tot	–	77 884	7298	14 902	27 120	28 564

N_tot/A [kpc⁻²]	–	8.3	8.6	13.4	7.4	7.6

	Median	$6 . 6_{- 4.6}^{+ 24.6}$ $6.6^{+24.6}_{-4.6}$	$4 . 6_{- 3.2}^{+ 16.2}$ $4.6^{+16.2}_{-3.2}$	$7 . 1_{- 4.8}^{+ 30.7}$ $7.1^{+30.7}_{-4.8}$	$5 . 9_{- 6.7}^{+ 21.2}$ $5.9^{+21.2}_{-6.7}$	$7 . 7_{- 5.6}^{+ 27.0}$ $7.7^{+27.0}_{-5.6}$
M_mol [10⁴ M_⊙]	Mean	20.8	14.2	25.9	17.6	22.8
	Weighted	137.6	75.7	196.9	111.7	131.8

	Median	$37 . 4_{- 20.0}^{+ 46.3}$ $37.4^{+46.3}_{-20.0}$	$34 . 9_{- 18.4}^{+ 41.8}$ $34.9^{+41.8}_{-18.4}$	$34 . 7_{- 18.6}^{+ 44.2}$ $34.7^{+44.2}_{-18.6}$	$38 . 2_{- 20.2}^{+ 47.0}$ $38.2^{+47.0}_{-20.2}$	$38 . 9_{- 21.1}^{+ 47.5}$ $38.9^{+47.5}_{-21.1}$
R_eq [pc]	Mean	48.3	45.1	45.5	49.4	49.69
	Weighted	92.2	85.2	92.7	95.2	91.2

	Median	$15 . 3_{- 8.7}^{+ 28.7}$ $15.3^{+28.7}_{-8.7}$	$12 . 7_{- 7.5}^{+ 21.5}$ $12.7^{+21.5}_{ -7.5}$	$21 . 3_{- 12.8}^{+ 38.7}$ $21.3^{+38.7}_{-12.8}$	$13 . 0_{- 6.7}^{+ 20.8}$ $13.0^{+20.8}_{-6.7}$	$16 . 3_{- 9.6}^{+ 32.0}$ $16.3^{+32.0}_{-9.6}$
Σ_mol [M_⊙ pc⁻²]	Mean	30.0	23.3	39.3	24.2	32.4
	Weighted	48.4	33.0	62.0	40.3	49.1

Notes. Each property is shown with its median, mean, and luminosity-weighted mean values. Medians with the 84th–50th percentile and 50th–16th percentile displayed in superscript and subscript, respectively. Here, N_tot/A refers to the total number of clouds within an environment divided by the total galaxy-by-galaxy summed area of a specific environment.

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