Stellar structures, molecular gas, and star formation across the PHANGS sample of nearby galaxies

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Table 4.

Bisector fits to molecular Kennicutt–Schmidt relation for the different α_CO prescriptions.

		PHANGS α_CO	Constant α_CO	N12 α_CO	B13 α_CO
	Slope	1.37 ± 0.96	1.35 ± 0.99	1.82 ± 1.81	1.75 ± 3.65
Centre	Intercept	−3.61 ± 0.18	−3.81 ± 0.19	−4.47 ± 0.27	−3.50 ± 0.51
	Spearman ρ	0.87	0.87	0.78	0.19

	Slope	0.93 ± 0.16	0.88 ± 0.15	1.04 ± 0.25	1.46 ± 0.68
Bar	Intercept	−3.02 ± 0.03	−2.97 ± 0.03	−3.39 ± 0.04	−3.93 ± 0.08
	Spearman ρ	0.88	0.88	0.87	0.72

	Slope	1.08 ± 0.17	1.03 ± 0.17	1.30 ± 0.33	1.99 ± 1.25
Spiral	Intercept	−3.17 ± 0.03	−3.22 ± 0.03	−3.80 ± 0.05	−4.52 ± 0.13
	Spearman ρ	0.89	0.88	0.86	0.72

	Slope	0.84 ± 0.10	0.79 ± 0.09	0.91 ± 0.18	1.26 ± 0.42
Interarm	Intercept	−2.91 ± 0.02	−2.87 ± 0.02	−3.25 ± 0.03	−3.82 ± 0.06
	Spearman ρ	0.72	0.77	0.79	0.65

	Slope	1.06 ± 0.10	0.99 ± 0.09	1.18 ± 0.18	1.43 ± 0.43
Disc	Intercept	−2.98 ± 0.02	−2.90 ± 0.01	−3.37 ± 0.03	−3.73 ± 0.05
	Spearman ρ	0.74	0.71	0.72	0.43

	Slope	0.97 ± 0.06	0.90 ± 0.05	1.10 ± 0.10	1.43 ± 0.27
All	Intercept	−2.98 ± 0.01	−2.92 ± 0.01	−3.38 ± 0.02	−3.86 ± 0.04
	Spearman ρ	0.79	0.78	0.78	0.54

Notes. The p-values of the Spearman rank correlation coefficients (ρ) shown in this table are very low (always < 1%), suggesting that the correlations are significant (except for centres with B13 prescription, p-value = 0.44).

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