论文标题
星形漫画星系中不同BPT类型的周环区域：AGN可检测性
Circumnuclear regions of different BPT types in star-forming MaNGA galaxies: AGN detectability
论文作者
论文摘要
我们考虑漫画星系的周环区域。根据它们在BPT图上的位置，这些光谱被归类为类似AGN的HII区域样（或类似SF）和中间（INT）光谱。在环核区域中有以下四个辐射分布的配置：1）Agn+int，Agn样辐射的最内向区域被中间类型的辐射环围绕； 2）INT，中间类型的辐射的中心区域； 3）SF+INT，HII区域样辐射的内部区域被中等类型的辐射环围绕；和4）SF，仅HI-Region样辐射。检查了配置1和2的衬里。衬里的Spaxel光谱在BPT图上形成了A序列。线比随半径平稳变化，从中心的类似AGN到较大距离的HII区域。这与范式一致，即衬里受到AGN活性的激发。环核区域的AGN和INT辐射伴随着增强的气体速度分散体S_G。 AGN和INT辐射区域的半径与增强的S_G区域的半径相似，并且中央S_G，C与Agn+Int区域的亮度相关。我们假设气速分散体可以作为AGN活性的指标。 S_G，c的SF型中心的值部分与AGN型中心的值重叠。我们发现，在S_G，C-中央HALPHA表面亮度图上，Agn类型的位置和SF型对象之间存在分界线。
We consider the circumnuclear regions of MaNGA galaxies. The spectra are classified as AGN-like, HII-region-like (or SF-like), and intermediate (INT) spectra according to their positions on the BPT diagram. There are the following four configurations of the radiation distributions in the circumnuclear regions: 1) AGN+INT, the innermost region of the AGN-like radiation is surrounded by a ring of radiation of the intermediate type; 2) INT, the central area of radiation of the intermediate type; 3) SF+INT, the inner region of the HII-region-like radiation is surrounded by a ring of radiation of the intermediate type; and 4) SF, the HII-region-like radiation only. The LINERS of configurations 1 and 2 are examined. The spaxel spectra of the LINERs form a sequences on the BPT diagram. The line ratios change smoothly with radius, from AGN-like at the center to HII-region-like at larger distances. This is in agreement with the paradigm that the LINERs are excited by AGN activity. The AGN and INT radiation in the circumnuclear region is accompanied by an enhanced gas velocity dispersion, s_g. The radius of the area of the AGN and INT radiation is similar to the radius of the area with enhanced s_g, and the central s_g,c correlates with the luminosity of the AGN+INT area. We assume that the gas velocity dispersion can serve as an indicator of the AGN activity. The values of s_g,c for the SF-type centers partly overlap with those of the AGN-type centers. We find that there is a demarcation line between the positions of the AGN-type and SF-type objects on the s_g,c - central Halpha surface brightness diagram.
