Table 2: Precession, orbital and flare properties of the BBH system in 3C 345.
Geometrical parameters

Viewing angle of the jet $\iota$ $6.5\hbox{$^\circ$ }$

Position angle of the jet in the plane of the sky $\Psi_{{\rm proj}}$ $-95\hbox{$^\circ$ }$

Opening half-angle of precession cone $\Omega _{\rm p}$ $1.45\hbox{$^\circ$ }$

Precession period of accretion disk $T_{\rm p}$ 2570 yr

Characteristic dampening (comoving) timescale of perturbation $t_{{\rm beam}}$ 180 yr

Maximum perturbation amplitude R₀ 1 pc

Kinematic parameters

Alfvén speed $V_{\rm A}$ 0.078 c

Initial Lorentz factor of radio emitting plasma $\Gamma_{{\rm min,r}}$ 3.5

Initial Lorentz factor of optically emitting plasma $\Gamma_{{\rm min,o}}$ 12

Terminal Lorentz factor of jet plasma $\Gamma_{{\rm max}}$ 20

Plasma acceleration (comoving) timescale $t_{{\rm acc}}$ 165 yr

Parameters of the binary system

Primary black hole mass M₁ $7.1\times 10^8~{M}_{\odot}$

Secondary black hole mass M₂ $7.1\times 10^8~{M}_{\odot}$

Orbital period $T_{\rm o}$ 480 yr

Orbital separation $r_{\rm o}$ 0.33 pc

Orbital eccentricity e <0.1

Characteristic rotational period of accretion disk $T_{{\rm disk}}$ 240 yr

Flare parameters and initial conditions

Plasma injection epoch $t_{{\rm inj}}$ 1991.05

Initial precession phase $\phi_{\rm p}$ 100 $\hbox {$^\circ $ }$

Initial orbital phase $\phi_{\rm o}$ 125 $\hbox {$^\circ $ }$

**Table 2:** Precession, orbital and flare properties of the BBH system in 3C 345.
Geometrical parameters
Viewing angle of the jet	$\iota$	$6.5\hbox{$^\circ$ }$
Position angle of the jet in the plane of the sky	$\Psi_{{\rm proj}}$	$-95\hbox{$^\circ$ }$
Opening half-angle of precession cone	$\Omega _{\rm p}$	$1.45\hbox{$^\circ$ }$
Precession period of accretion disk	$T_{\rm p}$	2570 yr
Characteristic dampening (comoving) timescale of perturbation	$t_{{\rm beam}}$	180 yr
Maximum perturbation amplitude	R₀	1 pc
Kinematic parameters
Alfvén speed	$V_{\rm A}$	0.078 c
Initial Lorentz factor of radio emitting plasma	$\Gamma_{{\rm min,r}}$	3.5
Initial Lorentz factor of optically emitting plasma	$\Gamma_{{\rm min,o}}$	12
Terminal Lorentz factor of jet plasma	$\Gamma_{{\rm max}}$	20
Plasma acceleration (comoving) timescale	$t_{{\rm acc}}$	165 yr
Parameters of the binary system
Primary black hole mass	M₁	$7.1\times 10^8~{M}_{\odot}$
Secondary black hole mass	M₂	$7.1\times 10^8~{M}_{\odot}$
Orbital period	$T_{\rm o}$	480 yr
Orbital separation	$r_{\rm o}$	0.33 pc
Orbital eccentricity	e	<0.1
Characteristic rotational period of accretion disk	$T_{{\rm disk}}$	240 yr
Flare parameters and initial conditions
Plasma injection epoch	$t_{{\rm inj}}$	1991.05
Initial precession phase	$\phi_{\rm p}$	100 $\hbox {$^\circ $ }$
Initial orbital phase	$\phi_{\rm o}$	125 $\hbox {$^\circ $ }$

Source LaTeX | All tables | In the text

	1 Introduction
	2 The binary black hole model
	3 The quasar 3C 345
	4 Application of the BBH model
	5 Properties of the BBH system in 3C 345
	6 Discussion
	7 Conclusions
	References