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- W3100541763 abstract "The young nearby solar-type star HD 91962 is a rare quadruple system where three companions revolve around the main component with periods of 170.3 days, 8.85 years, and 205 years. The two outer orbits are nearly co-planar, and all orbits have small eccentricities. We refine the visual orbit of the outer pair, determine the combined spectro-interferometric orbit of the middle 8.8-yr pair and the spectroscopic orbit of the inner binary. The middle and inner orbits are likely locked in a 1:19 resonance, the ratio of the outer and middle periods is ~23. The masses of all components are estimated (inside-out: 1.14, 0.32, 0.64, 0.64 solar mass), the dynamical parallax is 27.4+-0.6 mas. We speculate that this multiple system originated from collapse of an isolated core and that the companions migrated in a dissipative disk. Other multiple systems with similar features (coplanarity, small eccentricity, and period ratio around 20) are known." @default.
- W3100541763 created "2020-11-23" @default.
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- W3100541763 date "2015-05-21" @default.
- W3100541763 modified "2023-10-16" @default.
- W3100541763 title "THE UNUSUAL QUADRUPLE SYSTEM HD 91962 WITH A “PLANETARY” ARCHITECTURE" @default.
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- W3100541763 doi "https://doi.org/10.1088/0004-6256/149/6/195" @default.
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