Supercritical colliding wind binaries | Astronomy & Astrophysics (A&A)

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Table 3.

Parameters of NGC 4190 ULX 1.

Parameter	Symbol	Value	Units
System

Inclination ⁽¹⁾	i	0	°
Orbital semi-axis ⁽²⁾	a	15	R_⊙
Distance to the source ⁽³⁾	d	3	Mpc

Black hole

Mass ⁽¹⁾	M_BH	10	M_⊙
Gravitational radius ⁽²⁾	r_g	1.48 × 10⁶	cm

Accretion disk

Disk semi opening angle ⁽¹⁾	δ	30	°
Critical radius ⁽²⁾	r_crit	3.5 × 10⁹	cm
Eddington accretion rate	Ṁ_Edd	2.2 × 10⁻⁷	M_⊙ yr⁻¹
Mass accretion rate ⁽¹⁾	Ṁ_input	2.2 × 10⁻⁶	M_⊙ yr⁻¹
Mass loss in winds ⁽¹⁾	Ṁ_dw	1.98 × 10⁻⁶	M_⊙ yr⁻¹
Wind velocity ⁽²⁾	v_dw	4.95 × 10⁹	cm s⁻¹
Wind semi opening angle ⁽²⁾	θ	14.5	°
Beaming factor ⁽²⁾	b	0.07	−

B2V Star

Mass ⁽⁴⁾	M_*	8	M_⊙
Radius ⁽⁴⁾	R_*	5.4	R_⊙
Temperature ⁽⁴⁾	T_eff	20600	K
Mass loss in winds ⁽⁴⁾	ṁ_∗	1.4 × 10⁻⁷	M_⊙ yr⁻¹
Wind velocity ⁽⁴⁾	v_*w	7 × 10⁷	cm s⁻¹
Rotation velocity ⁽¹⁾		7 × 10⁶	cm s⁻¹
Magnetic field ⁽⁵⁾	B_*	200	G

Colliding winds

Kinetic power of disk-driven wind ⁽²⁾		1.5 × 10³⁹	erg s⁻¹
Kinetic power of stellar wind ⁽²⁾		2.17 × 10³⁴	erg s⁻¹
Distance from BH to SP ⁽²⁾	r_BH	6.68 × 10¹¹	cm
Size of acceleration region ⁽¹⁾	Δx_ac	6.68 × 10¹⁰	cm
Magnetic field at SP ⁽²⁾	B_SP	200	G
Injection spectral index ⁽¹⁾	p	2.2	−
Acceleration efficiency ⁽²⁾	η_ac	10⁻²	−
Molecular mean weight ⁽¹⁾	μ	0.6	−

Reverse shock

Velocity⁽²⁾	v_RS	4.4 × 10⁹	cm s⁻¹
Temperature⁽²⁾	T_RS	10¹⁰	K
Cold matter density⁽²⁾	n_RS	6.9 × 10¹¹	cm⁻³
Cooling length⁽²⁾	R_Λ	2.2 × 10¹³	cm

Notes. We indicate the parameters we have assumed with superscript (1) and those we have derived with (2). Parameters with superscripts (3), (4), and (5) were taken from Tully et al. (2013), Kobulnicky et al. (2019), and Shultz et al. (2015), respectively.

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