论文标题
银河系和大众集会（GAMA）：$ \ textit {wise} $研究G23中排放线系统活动的研究
Galaxy and Mass Assembly (GAMA): A $\textit{WISE}$ study of the activity of emission-line systems in G23
论文作者
论文摘要
我们介绍了GAMA G23区域的发射线系统的详细研究，利用$ \ textit {wise} $光度法，其中包括精心衡量的已解决源。在对$ \ sim $ 41,000星系的初始目录进行了几次削减后，我们提取了9,809个星系的样品。然后，我们将1154个排放线星系（38 $ \％$ in W1中的频谱诊断（BPT）分类）与它们在$ \ textit {wise} $ colour-colour图中的位置进行比较，从而导致了一个新的“温暖” $ fexpence $ fexpence $ fexperce $ c $ c $ feption} $ c $ feption} $ c $ c $ c $ c $ c $ c $ c $ c $ c的colour-colour colour-colour colour-colour colour-colour colour-colour图。 AGN地区。我们发现，bpt和$ \ textit {wise} $图表在85 $ \％$和8 $ \％$的分类中达成共识，分别为non-agn（star forming = sf）和agn，并在整个分类样品中不同意$ \ sim $ \ sim $ 7 $ \％$。 39 $ \％$的AGN（所有类型）是广泛的系统，[\ ion {n} {ii}]和[H $α$]的通量几乎无法分解，在大多数情况下，在大多数情况下给出了[\ ion {\ ion {n} {ii} {ii}]/[H $α$]的通量率。但是，几种光学AGN似乎与$ \ textit {wise} $中的SF完全一致。我们认为这些可能是低功率AGN，或者宿主主导IR发射的系统。另外，鉴于这些星系中有时很高的[\ ion {o} {iii}]的光度，因此发射线可能是由与SF相关的超级风向而不是AGN活性产生的。根据我们的发现，我们创建了一个新的诊断：[W1-W2] vs [\ ion {n} {ii}]/[H $α$]，它具有将SF与AGN和高激烈源分开的优点。它分类为3 $ \ sim $ 5倍的星系$ 5倍
We present a detailed study of emission-line systems in the GAMA G23 region, making use of $\textit{WISE}$ photometry that includes carefully measured resolved sources. After applying several cuts to the initial catalogue of $\sim$41,000 galaxies, we extract a sample of 9,809 galaxies. We then compare the spectral diagnostic (BPT) classification of 1154 emission-line galaxies (38$\%$ resolved in W1) to their location in the $\textit{WISE}$ colour-colour diagram, leading to the creation of a new zone for mid-infrared "warm" galaxies located 2$σ$ above the star-forming sequence, below the standard $\textit{WISE}$ AGN region. We find that the BPT and $\textit{WISE}$ diagrams agree on the classification for 85$\%$ and 8$\%$ of the galaxies as non-AGN (star forming = SF) and AGN, respectively, and disagree on $\sim$7$\%$ of the entire classified sample. 39$\%$ of the AGN (all types) are broad-line systems for which the [\ion{N}{ii}] and [H$α$] fluxes can barely be disentangled, giving in most cases spurious [\ion{N}{ii}]/[H$α$] flux ratios. However, several optical AGN appear to be completely consistent with SF in $\textit{WISE}$. We argue that these could be low power AGN, or systems whose hosts dominate the IR emission. Alternatively, given the sometimes high [\ion{O}{iii}] luminosity in these galaxies, the emission lines may be generated by shocks coming from super-winds associated with SF rather than the AGN activity. Based on our findings, we have created a new diagnostic: [W1-W2] vs [\ion{N}{ii}]/[H$α$], which has the virtue of separating SF from AGN and high-excitation sources. It classifies 3$\sim$5 times more galaxies than the classic BPT
