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Публикации по объекту
Pulkovo compilation of radial velocities for 35495 stars in a common system.
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| Maximum separations among cataloged binaries
The paper classifies many of the widest common-motion binaries listed inthe Aitken catalog and list 72 physical pairs with known photoelectricphotometry, 31 physical pairs without good photometry, and 27 opticalpairs. As a function of primary types, the physical systems have upperlimits to their separations that are exceeded by some of the opticalpairs. The fact that optical pairs occur with larger separations impliesthat the limits are real ones and not just catalog limitations. Thoselimits (in AU) are expressed by 2500 M1 exp 1.54 for B5-KO main-sequenceprimaries. The same limits hold for the Trapezium and hierarchicalsystems studied previously.
| Cyanogen strengths, mixing and supermetallicity in G and K giants
Wide visual binaries consisting of a G or K giant in physicalassociation with an F dwarf, observed using DDO and ubvy photometry,were used to study the possibility of mixing in the giants prior to orduring helium core burning. The two abundance indices, delta m1 of theuvby system, and delta CN of the DDO system, are compared to study thepossibility that mixing from a hydrogen burning region has affected theCN strengths of the giants.
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Группы:
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Наблюдательные данные и астрометрия
| Созвездие: | Лира |
| Прямое восхождение: | 18h42m55.76s |
| Склонение: | +44°55'56.3" |
| Видимая звёздная величина: | 8.649 |
| Расстояние: | 135.318 парсек |
| Собственное движение RA: | -15.5 |
| Собственное движение Dec: | -20.2 |
| B-T magnitude: | 9.3 |
| V-T magnitude: | 8.703 |
Каталоги и обозначения:
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