Direct imaging and dynamical mass of a benchmark T-type brown dwarf companion to HD 167665

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Volume 691 (November 2024)

A&A, 691 (2024) A263

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Table 6

Orbital parameters and dynamical mass of HD 167665B derived using the BINARYS tool.

Parameter	Unit	Median ± 1σ
Fitted parameters
Period P	yr	${12.134}_{- 0.014}^{+ 0.014}$ $12.134_{ - 0.014}^{ + 0.014}$
Time periastron T₀	JD	${2452520.4}_{- 4.3}^{+ 4.6}$ $2452520.4_{ - 4.3}^{ + 4.6}$
Eccentricity e		${0.339}_{- 0.002}^{+ 0.002}$ $0.339_{ - 0.002}^{ + 0.002}$
Inclination i	°	${58.85}_{- 0.68}^{+ 0.74}$ $58.85_{ - 0.68}^{ + 0.74}$
Arg. periastron ω	°	${43.94}_{- 0.40}^{+ 0.45}$ $43.94_{ - 0.40}^{ + 0.45}$
PA of asc. node Ω	°	${217.84}_{- 0.76}^{+ 0.76}$ $217.84_{ - 0.76}^{ + 0.76}$
Syst. velocity γ	m s⁻¹	$- {74.2}_{- 2.2}^{+ 2.2}$ $- 74.2_{ - 2.2}^{ + 2.2}$
RV offset ZP_C07	m s⁻¹	${13.5}_{- 3.5}^{+ 3.7}$ $13.5_{ - 3.5}^{ + 3.7}$
RV offset ZP_C14	m s⁻¹	${47.1}_{- 4.2}^{+ 3.4}$ $47.1_{ - 4.2}^{ + 3.4}$
RV offset ZP_HIRES	m s⁻¹	${209.2}_{- 2.6}^{+ 2.8}$ $209.2_{ - 2.6}^{ + 2.8}$
RV jitter	m s⁻¹	${7.6}_{- 3.2}^{+ 3.6}$ $7.6_{ - 3.2}^{ + 3.6}$
α	deg ± mas	${274.3486027}_{- 0.37}^{+ 0.37}$ $274.3486027_{ - 0.37}^{ + 0.37}$
δ	deg ± mas	$- {28.2886062}_{- 0.23}^{- 0.21}$ $- 28.2886062_{ - 0.23}^{ - 0.21}$
Parallax ϖ	mas	${32.44}_{- 0.09}^{+ 0.10}$ $32.44_{ - 0.09}^{ + 0.10}$
µ_α	mas yr⁻¹	${136.32}_{- 0.01}^{+ 0.02}$ $136.32_{ - 0.01}^{ + 0.02}$
µ_δ	mas yr⁻¹	$- {148.06}_{- 0.01}^{+ 0.01}$ $- 148.06_{ - 0.01}^{ + 0.01}$
M₁	M_⊙	${1.11}_{- 0.02}^{+ 0.03}$ $1.11_{ - 0.02}^{ + 0.03}$
M₂	M_J	${60.3}_{- 0.7}^{+ 0.7}$ $60.3_{ - 0.7}^{ + 0.7}$

Notes. The convention for α, δ, ϖ, µ_α, and µ_δ is the HIPPARCOS reference frame at epoch J1991.25.

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