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A survey of proper-motion stars. VI - Orbits for 40 spectroscopic binaries
Orbital solutions are reported for 40 binaries in the Carney and Latham(1987) survey of proper-motion stars. The earlier orbital solutions forHD 85091, BD + 13 3683 deg, and HD 195987 are confirmed, and that for BD-3 2525 deg is revised. The number of orbital solutions for metal-poorbinaries has been increased from five to 19, six of which have doublelines. For periods longer than 20 days, the distribution of orbitaleccentricity for the metal-poor binaries is similar to that for themetal-rich binaries. For the metal-poor binaries, it is found that allthe short-period orbits are circular, with a transition to eccentricorbits at a period somewhere between 13 and 18 days. Presumably, theclose binaries with short periods were formed with eccentric orbitswhich were subsequently circularized by tidal mechanisms.
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Группы:
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Наблюдательные данные и астрометрия
| Созвездие: | Кит |
| Прямое восхождение: | 00h38m40.33s |
| Склонение: | +00°39'13.9" |
| Видимая звёздная величина: | 9.969 |
| Собственное движение RA: | 49.6 |
| Собственное движение Dec: | -12.1 |
| B-T magnitude: | 10.718 |
| V-T magnitude: | 10.031 |
Каталоги и обозначения:
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