V892 Tau: A tidally perturbed circumbinary disc in a triple stellar system

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Table 2

Initial parameters of the hydrodynamical simulations.

Inner binary

Parameter	Observations	Simulations
M_in (M_⊙)	6.0 ± 0.2	6.0
q_in	~0.5	0.5
a_in (au)	7.1 ± 0.1	7.1
e_in	0.27 ± 0.10	0.27
i_in (°)	59.3 ± 2.7	54.6
Ω_in (°)	${50.5}_{- 8.8}^{+ 9.6}$ $50.5_{ - 8.8}^{ + 9.6}$	53
ω_in (°)	${179.9}_{- 30.3}^{+ 44.4}$ $179.9_{ - 30.3}^{ + 44.4}$	180
Outer binary

Parameter	Observations	Simulations

M_out (M_⊙)	–	6.5
q_out	–	0.08
a_out (au)	–	500
e_out	–	ref: 0.2 i30: 0.2
		e05: 0.5 i60: 0.2
		ei60: 0.5
ⁱout ^(°)	-	ref: 54.6 i30: 24.6
		e05: 54.6 i60: −5.6
		ei60: −5.6
Ω_out (°)	–	53
ω_out (°)	–	180
Circumbinary disc

Parameter	Observations	Simulations

R_in (au)	–	14.2
R_out (au)	196±3	200
R₀ (au)	100	100
M_d (M_⊙)	~0.06	0.06
p	–	1
q	0.185	0.185
Ω_d (°)	53.0 ± 0.7	53
i_d (°)	54.6 ± 1.3	54.6
${\frac{H}{R} \|}_{R_{0}}$ ${\left. {{H \over R}} \right\|_{{R_0}}}$	0.055	0.055
α_SS	–	0.005

Notes. The indices in, out and d refer to the inner binary, the outer binary and the disc respectively. ‘–’ indicates a lack of data. The reference plane is the sky-plane. The disc parameters are taken from the centre of the inner binary. The observational values are taken from L21.

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