Orbits of Six Triple Systems
Joint analysis of position measurements and radial velocities of six triple stellar systems is conducted to determine their inner and/or outer orbits. Accumulation of such data is needed to study the architecture of stellar hierarchies and its relation to the formation mechanisms. The inner periods...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/ada3c6 |
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| author | Andrei Tokovinin |
| author_facet | Andrei Tokovinin |
| author_sort | Andrei Tokovinin |
| collection | DOAJ |
| description | Joint analysis of position measurements and radial velocities of six triple stellar systems is conducted to determine their inner and/or outer orbits. Accumulation of such data is needed to study the architecture of stellar hierarchies and its relation to the formation mechanisms. The inner periods in the six systems (HIP 11783, 64836, 72423, 84720, 89234, and 105404) range from 0.5 days to 44 yr. The shortest outer period of 3.34 yr is found in the compact triple HIP 105404 (BS Ind). The resolved triple system HIP 64836 has comparable inner and outer periods (5 and 30 yr), placing it near the limit of dynamical stability, while its quasi-circular and coplanar orbits suggest a 1:6 mean motion resonance. The periods in HIP 89234 (44 and ~450 yr) are also comparable, but the mutual orbit inclination is large, 54°. Masses of the components are estimated and each system is discussed individually. |
| format | Article |
| id | doaj-art-d9b70f5f96a84794b82265d2f5bece2d |
| institution | Kabale University |
| issn | 1538-3881 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj-art-d9b70f5f96a84794b82265d2f5bece2d2025-02-05T09:11:00ZengIOP PublishingThe Astronomical Journal1538-38812025-01-01169312410.3847/1538-3881/ada3c6Orbits of Six Triple SystemsAndrei Tokovinin0https://orcid.org/0000-0002-2084-0782Cerro Tololo Inter-American Observatory , NSF’s NOIRLab, Casilla 603, La Serena, Chile ; andrei.tokovinin@noirlab.eduJoint analysis of position measurements and radial velocities of six triple stellar systems is conducted to determine their inner and/or outer orbits. Accumulation of such data is needed to study the architecture of stellar hierarchies and its relation to the formation mechanisms. The inner periods in the six systems (HIP 11783, 64836, 72423, 84720, 89234, and 105404) range from 0.5 days to 44 yr. The shortest outer period of 3.34 yr is found in the compact triple HIP 105404 (BS Ind). The resolved triple system HIP 64836 has comparable inner and outer periods (5 and 30 yr), placing it near the limit of dynamical stability, while its quasi-circular and coplanar orbits suggest a 1:6 mean motion resonance. The periods in HIP 89234 (44 and ~450 yr) are also comparable, but the mutual orbit inclination is large, 54°. Masses of the components are estimated and each system is discussed individually.https://doi.org/10.3847/1538-3881/ada3c6Visual binary starsTrinary starsMultiple starsSpectroscopic binary stars |
| spellingShingle | Andrei Tokovinin Orbits of Six Triple Systems The Astronomical Journal Visual binary stars Trinary stars Multiple stars Spectroscopic binary stars |
| title | Orbits of Six Triple Systems |
| title_full | Orbits of Six Triple Systems |
| title_fullStr | Orbits of Six Triple Systems |
| title_full_unstemmed | Orbits of Six Triple Systems |
| title_short | Orbits of Six Triple Systems |
| title_sort | orbits of six triple systems |
| topic | Visual binary stars Trinary stars Multiple stars Spectroscopic binary stars |
| url | https://doi.org/10.3847/1538-3881/ada3c6 |
| work_keys_str_mv | AT andreitokovinin orbitsofsixtriplesystems |