Dynamics of Four Triple Systems
نویسندگان
چکیده
Abstract Orbital motions in four hierarchical stellar systems discovered by speckle interferometry are studied. Their inner orbits relatively well constrained, while the long outer less certain. The eccentric and misaligned early-type hierarchies ϵ Cha (B9V, central star of 5 Myr old association, P = 6.4 yr, e 0.73) I 385 (A0V, ∼ 300 0.8) suggest past dynamical interactions. nearly equal masses could be explained a decay 2+2 quadruple progenitor consisting similar stars. However, there is no evidence associated recoil, so just consequence accretion from same core. other two hiearchies, HIP 32475 (F0IV, period 12.2 yr) 42910 (K7V, 6.8 yr), have smaller double twins where both mass ratios close to one. A twin either result merger one pair or can formed successive fragmentation followed accretion.
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2023
ISSN: ['1538-3881', '0004-6256']
DOI: https://doi.org/10.3847/1538-3881/acbf32