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The Structure of Stellar Disks in Isolated Lenticular Galaxies
The Astronomical Journal ( IF 5.3 ) Pub Date : 2020-07-31 , DOI: 10.3847/1538-3881/ab9eaf
Olga K. Sil’chenko 1 , Alexei Yu. Kniazev 1, 2, 3 , Ekaterina M. Chudakova 1
Affiliation  

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.

中文翻译:

孤立透镜状星系中星盘的结构

我们已经获得了两个光度带 g 和 r 的成像数据,这些数据来自 42 个孤立透镜状星系的样本,这些样本使用 Las Cumbres 天文台的一米望远镜网络。我们已经分析了它们的大型星盘的结构。已经确定了表面亮度分布的参数,包括径向轮廓形状和圆盘厚度。在检查径向亮度分布后,所有星系都被分为纯指数(I型)、截断(II型)和反截断(III型)盘。通过将径向剖面形状的派生统计数据与我们之前的 S0s 星团样本进行比较,我们注意到 S0s 星系的星盘在非常稀薄的环境和星团中的显着差异:只有在稀疏环境中,II 型星盘才有轮廓截断,能够被找到的。这一发现意味着 S0 星系在不同环境中可能存在不同的动力学历史。
更新日期:2020-07-31
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