A possible two-fold scenario for the disc-corona of the luminous active galactic nucleus 1H 0419-577: A high-density disc or a warm corona

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Volume 700 (August 2025)

A&A, 700 (2025) A81

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Table 3.

Simultaneous fits above 3 keV of the May and November 2018 XMM-Newton/NuSTAR and of the June 2015 NuSTAR observation of 1H 0419-577.

Parameters	2018 May	2018 Nov	2015 June
	NuSTAR	NuSTAR	NuSTAR
	+XMM	+XMM
	ZCUTOFFPL + ZGA(broad) + ZGA(narrow)


E_cut (keV)	84 $_{- 5}^{+ 6}$ $^{+6}_{-5}$	96 $_{- 7}^{+ 8}$ $^{+8}_{-7}$	64 ± 2
Γ	1.62 ± 0.01	1.63 ± 0.01	1.58 ± 0.01
norm_zcutoffpl (×10⁻³)	2.9 ± 0.1	3.4 ± 0.1	4.3 ± 1
EW (narrow) (eV)	≤12
σ (broad) (keV)	0.23 $_{- 0.15}^{+ 0.10}$ $^{+0.10}_{-0.15}$
EW (broad) (eV)	44 $_{- 18}^{+ 26}$ $^{+26}_{-18}$	35 $_{- 19}^{+ 28}$ $^{+28}_{-19}$	47 $_{- 15}^{+ 21}$ $^{+21}_{-15}$
χ²/d.o.f. (χ_red²)	1666.6/1546 (1.08)


	RELXILLCP + ZGA(NARROW)


kT_hot (keV)	17 $_{- 3}^{+ 10}$ $^{+10}_{-3}$	18 $_{- 3}^{+ 20}$ $^{+20}_{-3}$	18 $_{- 2}^{+ 4}$ $^{+4}_{-2}$
Γ_hot	1.70 ± 0.02	1.69 ± 0.02	1.69 ± 0.01
log ξ ^(a)	3.8 $_{- 0.2}^{+ 0.3}$ $^{+0.3}_{-0.2}$	3.9 $_{- 0.2}^{+ 0.3}$ $^{+0.3}_{-0.2}$	3.9 $_{- 0.1}^{+ 0.2}$ $^{+0.2}_{-0.1}$
ℛ	0.6 $_{- 0.2}^{+ 0.4}$ $^{+0.4}_{-0.2}$	0.6 $_{- 0.2}^{+ 0.3}$ $^{+0.3}_{-0.2}$	0.8 $_{- 0.3}^{+ 0.4}$ $^{+0.4}_{-0.3}$
norm_relxillcp (×10⁻⁵)	3.6 $_{- 0.6}^{+ 0.7}$ $^{+0.7}_{-0.6}$	4.2 $_{- 0.7}^{+ 0.9}$ $^{+0.9}_{-0.7}$	4.8 $_{- 0.8}^{+ 0.9}$ $^{+0.9}_{-0.8}$
χ²/d.o.f. (χ_red²)	1622.7/1543 (1.05)


	REFLKERRD + ZGA(narrow)


kT_hot (keV)	23 ± 3	28 $_{- 3}^{+ 7}$ $^{+7}_{-3}$	25 ± 2
τ_hot	2.6 ± 0.1	2.2 ± 0.2	2.4 ± 0.1
log ξ ^(a)	3.1 ± 0.1	2.7 $_{- 0.2}^{+ 0.1}$ $^{+0.1}_{-0.2}$	2.7 $_{- 0.2}^{+ 0.1}$ $^{+0.1}_{-0.2}$
ℛ	0.40 $_{- 0.12}^{+ 0.01}$ $^{+0.01}_{-0.12}$	0.55 $_{- 0.04}^{+ 0.16}$ $^{+0.16}_{-0.04}$	0.50 $_{- 0.02}^{+ 0.06}$ $^{+0.06}_{-0.02}$
norm_reflkerr (×10⁻³)	2.2 ± 0.1	3.0 ± 0.1	4.1 ± 0.1
χ²/d.o.f. (χ_red²)	1603.8/1543 (1.04)


$F_{3 - 79 keV}^{unabs}$ $F^{\mathrm{unabs}}_{\mathrm{3-79\,keV}}$ ^(b)	3.1 × 10⁻¹¹	3.7 × 10⁻¹¹	3.9 × 10⁻¹¹
$L_{3 - 79 keV}^{unabs}$ $L^{\mathrm{unabs}}_{\mathrm{3-79\,keV}}$ ^(c)	9.3 × 10⁴⁴	10.9 × 10⁴⁴	11.7 × 10⁴⁴

Notes. ^(a)The ionisation parameter ξ (≡L_ion/(n_HR²)) is expressed in units of erg cm s⁻¹. ^(b)The 3–79 keV unabsorbed fluxes are expressed in units of erg cm⁻² s⁻¹. ^(c)The 3–79 keV unabsorbed luminosities are expressed in units of erg s⁻¹.

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