星系环的三维光谱研究：形成和运动学
3D spectroscopic study of galactic rings: formation and kinematics
摘要：
在这篇评论中，我们考虑各种环结构中观察到的星系。环的形成和演化是银河系形态研究中的一个有趣问题。它们与星系演化和动力学的基本方面有关，如星系中暗物质的性质和分布，星系相互作用和星系内部亚结构的长期演化。由于来自棒状图案的引力力矩，星系环的一个重要部分形成于盘中。与这种内部驱动的起源相反，极环星系的现象与星系间的相互作用和合并过程密切相关。一种罕见的碰撞环揭示了在与伴星强烈正面碰撞后在恒星和气体盘中触发的密度波。本文简要回顾了不同起源环中气体运动学的研究现状。我们强调，与法布里-珀罗干涉仪获得的电离气体的速度场提供了一个非常重要的信息，这些研究。
英文摘要：
In this review we consider various ring structures that are observed in galaxies. Formation and evolution of the rings are interesting problems in studies of galactic morphology. They are related to such fundamental aspects of galactic evolution and dynamics as the nature and distribution of the dark matter in galaxies, galactic interactions and internal secular evolution of galactic substructures. A significant fraction of galactic rings forms in the disks due to gravitational torques from bar-like patterns. In contrast to this internally driven origin, the phenomenon of the polar-ring galaxies is closely connected with the processes of intergalactic interactions and merging. A rare class of collisional rings reveals the density waves triggered in the stellar and gaseous disks after a strong head-on collision with a companion. We briefly review the status of studies of gas kinematics in the rings of different origin. We stress that velocity fields of the ionized gas obtained with the Fabry-Perot interferometers provide a very important information for these studies.
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