A Method of Obtaining the Pitch Angle of Spiral Arms and the Inclination of Galactic Discs
A Method of Obtaining the Pitch Angle of Spiral Arms and the Inclination of Galactic Discs
复制标题
一种获取旋臂螺距角和银盘倾角的方法
DOI：
10.1088/1009-9271/1/5/395
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Jun Ma
中科院分区：
文献类型：
--
作者：
Jun Ma
我们研究了星系盘的数学形式、螺旋结构的对称性和投影图像。给出了60个螺旋星系的旋臂俯仰角和星系盘倾角的测量结果。在研究中强调了全球螺旋结构。结果表明，除小尺度扭曲外，在Elmegreen和Elmegreen的ARM分类系统中被归类为AC12的星系的旋臂均可用对数螺线形式表示。
We investigate the mathematical form, the symmetry of spiral structure and the projected images of galactic discs. The measured pitch angles of spiral arms and inclination angles of galactic discs for 60 spiral galaxies are presented. The global spiral structure is emphasized in the study. It is found that, except for small-scale distortions, the spiral arms of those galaxies that were classified as AC 12 in the arm classification system of Elmegreen & Elmegreen, can be represented by the logarithmic spiral form.