论文标题
强大的T-SNE技术，导致BPT图中2型AGN和HII星系的清晰分离
Powerful t-SNE technique leading to clear separation of type-2 AGN and HII galaxies in BPT diagrams
论文作者
论文摘要
可以通过狭窄的发射线特性在众所周知的BPT图中区分狭窄的发射线星系。但是，除了理论光电离世模型所期望的极端分裂线外，在BPT图中，肉眼与HII星系之间的肉眼没有可见的边界。在这里，基于SDSS DR15中局部狭窄的发射线星系的强大T-SNE技术，可以在T-SNE确定的二维投影图中明确分离，然后可以在BPT图中明确分离，然后在BPT图中确定分裂线，从而导致实际属性和实际属性的概括。结果不仅提供了一种有趣且可靠的方法，可以通过强大的T-SNE技术来确定BPT图中的分界线，而且还导致对先前定义的复合星系的进一步确认更有效地将其分类为[OIII]/H $β$ versus [nii]/h $α$的BPT图。
Narrow emission-line galaxies can be distinguished in the well-known BPT diagrams through narrow emission line properties. However, there are no boundaries visible to the naked eye between type-2 AGN and HII galaxies in BPT diagrams, besides the extreme dividing lines expected by theoretical photoionization models. Here, based on powerful t-SNE technique applied to the local narrow emission-line galaxies in SDSS DR15, type-2 AGN and HII galaxies can be clearly separated in the t-SNE determined two-dimensional projected map, and then the dividing lines can be mathematically determined in BPT diagrams, leading to charming harmonization of the theoretical expectations and the actual results from real observed properties. The results not only provide an interesting and robust method to determine the dividing lines in BPT diagrams through the powerful t-SNE technique, but also lead to further confirmation on previously defined composite galaxies more efficiently classified in the BPT diagram of [OIII]/H$β$ versus [NII]/H$α$.
