arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.01129astro-ph.GA
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孤立透镜星系中的星盘结构

The structure of stellar disks in isolated lenticular galaxies

Olga K. Sil'chenko, Alexei Yu. Kniazev, Ekaterina M. Chudakova

摘要:

我们已经获得了成像数据在两个光度带,g和r,为42个孤立的透镜状星系的样本与拉斯坎布雷斯天文台一米望远镜网络。我们分析了它们的大尺度恒星盘的结构。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。在检查了径向亮度分布之后,所有的星系都被分为纯指数盘(I型)、截断盘(II型)和反截断盘(III型)。通过比较S0s星系团的径向轮廓形状的统计数据,我们发现S0s星系团的星盘在相当稀薄的环境中和在星系团中有显著的不同:只有在稀疏的环境中才能发现II型星盘,并且轮廓被截断,这一发现意味着S0星系在不同环境中可能有不同的动力学历史。

英文摘要:

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.

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。

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