|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ИНХС РАН |
||
The mechanism and timescale of nodal precession: two nuclear stellar disks in the Galactic centerстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 апреля 2019 г.
- Автор: Kondratyev B.P.
- Журнал: Baltic Astronomy
- Том: 24
- Год издания: 2015
- Издательство: Institute of Theoretical Physics and Astronomy
- Местоположение издательства: Lithuania
- Первая страница: 68
- Последняя страница: 75
- Аннотация: Abstract A dynamical model of interacting nuclear stellar rings in the central parsec of our Galaxy is constructed. We discuss the physical sources of nodal precession and of the associated time scales. For approximate study of the mutual orbital precession, we replace broad nuclear rings by weighted average narrow circular rings. The model with narrow circular rings is shown to adequately describe the nodal precession. The period of relativistic apsidal precession in the center of the Galaxy, ˜ 5...108 yr, is almost an order of magnitude longer that the period of nodal precession, ˜ 7...107 yr, due to gravitational perturbations of nuclear disks (or rings). An important property of the nodal precession of nuclear rings is established: the lines of nodes of the two rings rotate uniformly with the same angular velocity, but in different directions. This explains the important observational fact that the lines of nodes of nuclear disks are not collinear, but are directed at large angles to each other.
- Добавил в систему: Кондратьев Борис Петрович