SLUGGS巡天：修正的自旋椭圆率图中SLUGGS星系的轨迹
The SLUGGS Survey: Trails of SLUGGS galaxies in a modified spin-ellipticity diagram
摘要：
我们提出了径向轨道的四个早型星系嵌入中等规模的磁盘在一个修改的自旋椭圆率图。在这里，每个星系的自旋和椭圆率的配置文件显示为径向轨道，而不是一个单一的，通量加权孔径依赖值是常见的文献。使用一个单一的椭圆率和自旋参数是不足以捕捉这些星系的基本性质，从快速过渡到缓慢的旋转，因为一个移动到更大的半径，其中光盘不再占主导地位。在达到峰值后，这四个星系的径向轨道的特征是椭圆率和旋转随着半径的增加而下降，将它们与椭圆星系和透镜星系区分开来，透镜星系的圆盘在大半径处占主导地位。这些星系是所谓的盘状椭圆星系的例子，它们是椭圆星系（E）和透镜星系（S0）之间的形态混合体，并被指定为ES星系。使用自旋椭圆轨道提供了额外的结构信息，个别星系超过一个单一的光圈措施。这种轨道提供了一个关键的诊断早期类型的星系分类，特别是在时代的二维运动学（和光度）数据超过一个有效半径。
英文摘要：
We present radial tracks for four early-type galaxies with embedded intermediate-scale discs in a modified spin-ellipticity diagram. Here, each galaxy's spin and ellipticity profiles are shown as a radial track, as opposed to a single, flux-weighted aperture-dependent value as is common in the literature. The use of a single ellipticity and spin parameter is inadequate to capture the basic nature of these galaxies, which transition from fast to slow rotation as one moves to larger radii where the disc ceases to dominate. After peaking, the four galaxy's radial tracks feature a downturn in both ellipticity and spin with increasing radius, differentiating them from elliptical galaxies, and from lenticular galaxies whose discs dominate at large radii. These galaxies are examples of so-called discy elliptical galaxies, which are a morphological hybrid between elliptical (E) and lenticular (S0) galaxies, and have been designated ES galaxies. The use of spin-ellipticity tracks provides extra structural information about individual galaxies over a single aperture measure. Such tracks provide a key diagnostic for classifying early-type galaxies, particularly in the era of 2D kinematic (and photometric) data beyond one effective radius.
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。
