Table 3
Orbital elements of HD 142527 B obtained from a fit to the astrometric measurements presented in Table 2.
Parameter | Value | Unit |
---|---|---|
Semi-major axis, a | 10.80 ± 0.22 | au |
Eccentricity, e | 0.47 ± 0.01 | - |
Inclination, i | 149.47 ± 0.71 | deg |
(1) Argument of periapsis, ω | 186.45 ± 0.48 | deg |
(1)Long. of ascending node, ω | 161.51 ± 2.01 | deg |
Time at periapsis, t | 2020.42 ± 0.05 | yr |
Parallax, π | 6.35 ± 0.05 | mas |
Total mass, Mtot (M0) | 2.29 ± 0.06 | |
(2)Period, P | 23.50 ± 0.85 | yr |
(2)Distance at apoapsis, Rapoapsis | 15.85 ± 0.43 | au |
(3)8.80 ± 1.54 | ||
(1,2)Incl. w.r.t. outer disc, θout | (4)2.6 – 10.5 | deg |
Notes. (1)The orbital period and mutual inclinations are not direct results of the orbit fit, but are calculated from the posterior distribution. (2)In absence of any radial velocity data, there is a degeneracy in Ω and ω, and a second, equally valid, solution can be obtained by adding 180 deg to both ω and Ω. This also results in a degeneracy in the mutual inclinations, with θout = 68.45 ± 1.54 deg or 50.5−58.5 deg being a second set of valid solutions. (3)Using the parameters reported in Bohn et al. (2022) for the outer disc. (4)Using a range of 20–28 deg for the inclination of the outer disc, and Ωout = 160 deg (Verhoeff et al. 2011; Perez et al. 2014; Boehler et al. 2017; Price et al. 2018a; Garg et al. 2021).
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