JWST MIRI reveals the diversity of nuclear mid-infrared spectra of nearby type 2 quasars

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Table 5.

Parameters derived from the rotational diagrams of the QSO2s and from ALMA CO(2–1) observations.

QSO2	Fit	χ²	β	T_w	$log (〈 N_{H}^{w} 〉)$ ${\rm {\log (\langle N_{H}^w\rangle ) }}$	M_w	T_h	$log (〈 N_{H}^{h} 〉)$ ${\rm {\log (\langle N_{H}^h\rangle )} }$	M_h	$M_{H_{2}}^{nuc} (CO)$ ${\rm {M_{H_2}^{nuc} (CO)}}$	Warm-to-cold
				(K)	(cm⁻²)	(10⁶ M_⊙)	(K)	(cm⁻²)	(10⁶ M_⊙)	(10⁹ M_⊙)	ratio
J1010	PL	7.33	5.24	…	20.60	10.5	…	…	…	0.78	0.013
	2T	0.12	…	241	20.85	18.6	1017	18.38	0.06	…	0.024
J1100	PL	2.48	4.45	…	20.64	12.0	…	…	…	0.86	0.014
	2T	3.54	…	288	20.71	14.2	1010	18.85	0.20	…	0.017
J1356	PL	7.01	4.33	…	20.66	18.0	…	…	…	2.05	0.009
	2T	15.7	…	294	20.58	15.0	904	19.09	0.49	…	0.008
J1430	PL	6.03	5.20	…	21.27	38.2	…	…	…	2.21	0.017
	2T	10.5	…	258	21.30	41.0	742	19.57	0.76	…	0.019
J1509	PL	13.0	4.53	…	20.58	12.6	…	…	…	2.40	0.005
	2T	6.50	…	256	20.78	20.0	1107	18.68	0.16	…	0.008

Notes. Results from the fit with the single power law temperature distribution (PL), which represents both the hot (h) and warm (w) molecular gas and assumes that the column density follows a power law (dN_H∼T^βdT), are shown in the same columns as those corresponding to the warm component of the two-temperature (2T) fits. The column densities correspond to average values within the PSF radius and they should be considered as lower limits. The last two columns correspond to the mass of molecular gas measured in the central kiloparsec of the QSO2s (r = 0.5 kpc for J1100, J1356, J1430, and J1509 and r = 0.7 kpc for J1010), calculated from the CO(2–1) ALMA observations presented in Ramos Almeida et al. (2022) and assuming R₂₁ = 1 and α_CO = 4.35 M_⊙(K km s⁻¹ pc²)⁻¹, and the corresponding warm-to-cold gas mass ratio.

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