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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Dynamical modeling of SB galaxiesстатья
- Авторы: Khoperskov A.V., Moiseev A.V., Chulanova E.A.
- Журнал: Bulletin of the Crimean Astrophysical Observatory
- Том: 52
- Год издания: 2001
- Первая страница: 134
- Последняя страница: 144
- Аннотация: Using the method of N-bodies dynamical modeling distributions of different components of the galaxy stellar disk velocity dispersion have been derived. The velocity dispersion observed along the line of sight is strongly dependent on the galaxy inclination angle and on the mutual orientation of the bar and the disk major axis. The non-symmetric structures in the velocity dispersion distribution are shown to be 2-3 times as small as the sizes of the bar determined from the surface density. Dynamical models of individual SB galaxies (NGC 936, 1169, 2712) are constructed. The observed kinematic (rotation curves of the gaseous and stellar components, radial distribution of the velocity dispersion of stars) and photometric data admit an assumption that the classical gravitation instability of the global bar-mode in the stellar disk is responsible for the origin of bar structures in these objects, and the bar lifetime may be very long. The dynamical modeling makes it possible to investigate into non-stationary structures the lifetime of which is relatively short and which are observed only in the part of galaxies passing a particular evolution phase. Perhaps double-barred stellar disks belong to such objects.
- Добавил в систему: Моисеев Алексей Валерьевич