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ЗВЁЗДЫ В ЭПОХУ ФОРМИРОВАНИЯ АКТИВНОСТИ СОЛНЕЧНОГО ТИПАстатья
- Авторы: Кацова М.М., Бондарь Н.И.
- Сборник: Солнечная и солнечно-земная физика 2014
- Год издания: 2014
- Место издания: Главная (Пулковская) астрономическая обсерватория РАН Санкт-Петербург
- Первая страница: 205
- Последняя страница: 210
- Аннотация: The diagram of activity indices for the chromosphere and corona gives us a possibility to estimate the age of the G- and early K stars when solar-type activity with a regular cycle forms. The activity level of the stars in the age 1–2 Gyr is high enough, but it is already lower than the saturation level which is typical for the younger stars. Position of such a young Sun on the diagram coincides with the area where the strongly spotted BY Dra -type stars are concentrated. The rotation period of 7–12 days, related to this age, separates the stars with the activity saturation from the stars in which solar-type activity with the regular cycle is already established. Characteristics of activity of the young Sun in the epoch of establishing of a regular cycle are described. For the HK Project stars with reliable determinable cycles, we are revealed the trend to increase in the cycle duration with the age. These results can be helpful for development of the dynamo theory.
- Добавил в систему: Кацова Мария Михайловна