窄极环与宽极环/圆盘Galerkin
Narrow Polar Rings versus Wide Polar Ring/Disk Galaxies
摘要：
近10年来，人们对极环星系的形态和运动学进行了大量的研究，在极环星系的结构和形成机制方面取得了许多新的进展，这要归功于高分辨率的光度和光谱数据。在本文中，我回顾了这类星系的最新结果，从观测和理论研究。我专注于分析观察到的属性（例如，结构，颜色，年龄，金属丰度和运动学）的窄和宽极环星系。特别是，我比较了AM 2020 -504和NGC 4650 A，它们分别是窄极环和宽极环的两个原型。我讨论了这两种系统之间的相似性和差异，以及它们如何与这类星系的主要形成方案相协调。
英文摘要：
In the latest ten years, a big effort has given to study the morphology and kinematics of polar ring galaxies: many steps forward and new discoveries on the structure and formation mechanisms for such systems have been made during this time thanks to high resolution photometric and spectroscopic data. In this paper, I review the latest results obtained for this class of galaxies, from both observational and theoretical studies. I focus on the analysis of the observed properties (e.g., structure, colours, age, metallicity, and kinematics) for narrow and wide polar ring galaxies. In particular, I compare AM2020-504 and NGC4650A, which are the two prototypes for narrow and wide polar rings, respectively. I discuss similarities and differences between the two kinds of systems and how they reconcile with the main formation scenarios proposed for this class of galaxies.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
