Оглавление
Изображения
Загрузить ваше изображение
DSS Images Other Images
Публикации по объекту
10830 A He I observations of 455 stars
A comparison with K line, X-ray and other data, of 10830 A equivalentwidths (EW) measurements in 890 image tube spectra of 455 stars showsthat for the case of G stars, the EW correlates well with K lineintensity. Good correlation is also found between 10830 A EW and softX-ray fluxes, confirming the excitation of the line by coronal softX-rays, which can serve as a measure of coronal emission. It is alsofound that, in contradiction to published models, 10830 A is weak orabsent in O, B and A stars, and is absent in F and M supergiants.Moderate to high 10830 A EW is frequent in F and M dwarfs, G and Ksupergiants, and class K3 III. The 58 stars whose 10830 A EW was foundto be of 300 A or more should be relatively intense X-ray emitters.Almost all RS CVn stars show strong 10830 A absorption, and T Tauristars show both absorption and emission.
|
Добавить новую статью
Внешние ссылки
- - Внешних ссылок не найдено -
Добавить внешнюю ссылку
Группы:
|
Наблюдательные данные и астрометрия
| Созвездие: | Змея |
| Прямое восхождение: | 18h41m53.68s |
| Склонение: | +02°11'52.8" |
| Видимая звёздная величина: | 8.541 |
| Расстояние: | 699.301 парсек |
| Собственное движение RA: | 13.9 |
| Собственное движение Dec: | -5.7 |
| B-T magnitude: | 8.629 |
| V-T magnitude: | 8.549 |
Каталоги и обозначения:
|
