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3D spectroscopic study of galactic rings: Formation and kinematics

机译:银河系环的3D光谱研究:形成和运动学

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摘要

Various ring structures observed in galaxies are considered. Formation and evolution of the rings are interesting problems in studies of the galactic morphology that is related to fundamental aspects of galactic evolution and dynamics: the nature and distribution of the dark matter, galactic interactions and internal secular evolution of the galaxies. 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 more 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.
机译:考虑了在星系中观察到的各种环结构。在银河形态研究中,环的形成和演化是有趣的问题,与银河演化和动力学的基本方面有关:暗物质的性质和分布,银河系相互作用和星系的内部长期演化。由于来自棒状图案的重力,在磁盘中形成了很大一部分的银河系环。与这种内部驱动的起源相反,极环星系的现象与星际相互作用和合并过程密切相关。一类较罕见的碰撞环揭示了与同伴强烈的正面碰撞后,在恒星和气态盘中触发的密度波。我们简要回顾了不同起源的环中气体运动学的研究现状。我们强调用Fabry-Perot干涉仪获得的离子化气体的速度场为这些研究提供了非常重要的信息。

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