论文标题
矮椭圆形星系的光度分布
Luminosity Distribution of Dwarf Elliptical-like Galaxies
论文作者
论文摘要
我们介绍了本地宇宙中的$ \ sim910 $矮椭圆形星系的结构参数（$ z \ lyssim0.01 $），它来自斯隆数字天空调查（SDSS）的$ r- $ band图像。我们检查了结构参数对形态类型的依赖性（DS0，de，de $ _ {bc} $，dsph和de $ _ {blue} $）。如果我们由于DSPH和DE星系中的成核而适当地处理五个亚类型的结构参数存在显着差异。 DSPH星系中有效半径（$ <μ_{E}> $）内的平均表面亮度也与其他子类型的平均表面亮度显然不同。磁盘特征（例如螺旋臂）的频率取决于矮星系的形态。早期类型矮星系的DSPH星系与其他子类型之间最明显的差异是缺乏磁盘特征，这被认为与其起源密切相关。
We present the structural parameters of $\sim910$ dwarf elliptical-like galaxies in the local universe ($z\lesssim0.01$) derived from the $r-$band images of the Sloan Digital Sky Survey (SDSS). We examine the dependence of structural parameters on the morphological types (dS0, dE,dE$_{bc}$, dSph, and dE$_{blue}$). There is a significant difference in the structural parameters among the five sub-types if we properly treat the light excess due to nucleation in dSph and dE galaxies. The mean surface brightness within the effective radius ($<μ_{e}>$) of dSph galaxies is also clearly different from that of other sub-types. The frequency of disk features such as spiral arms depends on the morphology of dwarf galaxies. The most pronounced difference between dSph galaxies and other sub-types of early-type dwarf galaxies is the absence of disk feature which is thought to be closely related to their origin.
