Abstract

The origin of several rings in lenticular galaxies with no signs of ongoing or recent star formation (without emission lines and a signal in the ultraviolet spectral range) is investigated. Stellar population parameters—the average age and the magnesium–iron ratio—are measured; structural features are analyzed. It is concluded that the rings in all the galaxies have a different history of formation and a different nature; i.e., for only two of the four rings does the resonance origin associated with the dynamics of the central triaxial structure (bar) seem preferable.

中文翻译：

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柱状星系中纯恒星环的性质

摘要

研究了透镜状星系中几个环的起源，这些环没有持续或近期恒星形成的迹象（没有发射线，并且在紫外光谱范围内没有信号）。测量了恒星的种群参数，即平均年龄和镁铁比。分析结构特征。结论是，所有星系中的环具有不同的形成历史和不同的性质。也就是说，对于四个环中只有两个环，与中心三轴结构（棒）的动力学相关的共振起源似乎是可取的。