论文标题
孤立的膜状星系中恒星磁盘的结构
The structure of stellar disks in isolated lenticular galaxies
论文作者
论文摘要
我们已经在两个光度带G和R中获得了与LAS Cumbres天文台一米望远镜网络的42个分离的毛线星系的样品。我们已经分析了它们大规模恒星磁盘的结构。已经确定了表面亮度分布的参数，包括径向轮廓形状和磁盘厚度。检查径向亮度曲线后，所有星系都被分类为纯指数（I型），截断（II型）和抗凸透（III型）磁盘。通过将径向曲线形状的衍生统计数据与以前的群集S0样本进行比较，我们注意到在相当稀有的环境和集群中，S0S星系的恒星磁盘之间存在显着差异：仅在稀疏的环境中，才能找到具有轮廓漏洞的II型II型磁盘。这一发现意味着在不同环境中S0星系的不同动态历史可能。
We have obtained imaging data in two photometric bands, g and r, for a sample of 42 isolated lenticular galaxies with the Las Cumbres Observatory one-meter telescope network. We have analyzed the structure of their large-scale stellar disks. The parameters of surface brightness distributions have been determined including the radial profile shapes and disk thicknesses. After inspecting the radial brightness profiles, all the galaxies have been classified into pure exponential (Type I), truncated (Type II), and antitruncated (Type III) disks. By comparing the derived statistics of the radial profiles shapes with our previous sample of the cluster S0s, we noted a prominent difference between stellar disks of S0s galaxies in quite rarefied environments and in clusters: it is only in sparse environments that Type II disks, with profile truncations, can be found. This finding implies probable different dynamical history of S0 galaxies in different environments.
