Unveiling the dynamics of the ultrafast outflow in IRAS 13224-3809 with X-ray spectroscopy

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Table 1.

Comparison of best-fit parameters for models A, B, and C.

Parameter	Model A	Model B	Model C
Continuum
Γ	$2 . 71_{- 0.07}^{+ 0.06}$ $Mathematical equation: $ 2.71^{+0.06}_{-0.07} $$	$2 . 44_{- 0.04}^{+ 0.04}$ $Mathematical equation: $ 2.44^{+0.04}_{-0.04} $$	$2 . 11_{- 0.05}^{+ 0.03}$ $Mathematical equation: $ 2.11^{+0.03}_{-0.05} $$
`norm` (10⁻⁵)	120 ± 20	41 ± 3	$0 . 0054_{- 0.0012}^{+ 0.0050}$ $Mathematical equation: $ 0.0054^{+0.0050}_{-0.0012} $$

Broad Gaussian emission
E (keV)	−	6.2 ± 0.3	−
σ (keV)	−	$1 . 9_{- 0.2}^{+ 0.3}$ $Mathematical equation: $ 1.9^{+0.3}_{-0.2} $$	−
EW (keV)	−	1.4 ± 0.4	−
`norm` (10⁻⁶)	−	$9 . 0_{- 1.4}^{+ 1.8}$ $Mathematical equation: $ 9.0^{+1.8}_{-1.4} $$	−

Relativistic reflection
a	−	−	$0 . 3_{- 0.3}^{+ 0.7}$ $Mathematical equation: $ 0.3^{+0.7}_{-0.3} $$
i (deg)	−	−	$56_{- 2}^{+ 3}$ $Mathematical equation: $ 56^{+3}_{-2} $$
log ξ	−	−	3.8 ± 0.1
A_Fe	−	−	$3 . 0_{- 0.8}^{+ 1.0}$ $Mathematical equation: $ 3.0^{+1.0}_{-0.8} $$
R_refl	−	−	> 46

Ionized absorber 1
N_H (10²³ cm⁻²)	$7 . 5_{- 0.7}^{+ 1.0}$ $Mathematical equation: $ 7.5^{+1.0}_{-0.7} $$	$7 . 9_{- 4.0}^{+ 12}$ $Mathematical equation: $ 7.9^{+12}_{-4.0} $$	> 15
log ξ (erg cm/s)	3.2 ± 0.04	$3 . 6_{- 0.2}^{+ 0.4}$ $Mathematical equation: $ 3.6^{+0.4}_{-0.2} $$	$4 . 5_{- 0.9}^{+ 0.1}$ $Mathematical equation: $ 4.5^{+0.1}_{-0.9} $$
v_turb (km/s)	> 25 400	$14 000_{- 400}^{+ 600}$ $Mathematical equation: $ 14\,000^{+600}_{-400} $$	> 28 100
v_out (c)	0.32 ± 0.01	0.26 ± 0.01	0.27 ± 0.01

Ionized absorber 2
N_H (10²³ cm⁻²)	$8 . 9_{- 1.4}^{+ 1.3}$ $Mathematical equation: $ 8.9^{+1.3}_{-1.4} $$	> 171	−
log ξ (erg cm/s)	3.1 ± 0.1	$4 . 5_{- 0.8}^{+ 0.1}$ $Mathematical equation: $ 4.5^{+0.1}_{-0.8} $$	−
v_turb (km/s)	> 28 400	> 24 700	−
v_out (c)	0.48 ± 0.01	0.34 ± 0.02	−
χ²/d.o.f	253.85/212	207.29/209	204.71/211

Notes. Missing parameters are indicated by −. Models A and B use two photoionized outflowing components. Model C needs just one UFO and includes a relxill reflection component. For model C, continuum parameters (Γ, norm) refer to the intrinsic power law, while the reflection parameters describe the reprocessed component; both are computed self-consistently within relxill.

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