论文标题
矮人星系中隐藏的AGN漫画揭示了：轻回声，核外流浪者和一个新的宽线AGN
Hidden AGN in dwarf galaxies revealed by MaNGA: light echoes, off-nuclear wanderers, and a new broad-line AGN
论文作者
论文摘要
矮星系中的活性银河核（AGN）可能会容纳那些没有生长成超级质量黑洞的早期宇宙种子黑洞的遗物。使用漫画积分单元（IFU）光谱学我们找到了37个矮星系的样本，这些样品在空间分辨的发射线诊断图中显示出Agn离子化特征。 AGN签名在很大程度上被其中23个综合排放线诊断所遗漏。这23个新的AGN候选者的横光度光度为$ \ Lessim 10^{40} $ erg s $^{ - 1} $，比单纤维SDSS AGN，X射线AGN，X射线AGN和无线电AGN的DWARF星系中的无线电AGN，它具有强大的IFU光谱工具，可识别出强大的IFU光谱工具，可识别隐藏的AGN和隐藏的AGN。在大多数情况下，AGN发射偏离了矮星系的光学中心，并显示了一种对称形态，表明AGN是AGN不核外的，星系的中心发射以恒星形成为主导，或者AGN已转动，我们正在观察到过去的电离电离爆发。新的AGN显示了宽阔的H $α$发射线成分，我们在中间质量黑洞的领域中得出了一个黑洞质量。这构成了基于IFU光谱的矮星系中发现的第一个隐藏的1型AGN。隐藏和微弱的AGN样本的发现对矮星系中AGN的种群研究和种子黑洞形成模型具有重要意义。
Active galactic nuclei (AGN) in dwarf galaxies could possibly host the relics of those early Universe seed black holes that did not grow into supermassive black holes. Using MaNGA integral field unit (IFU) spectroscopy we have found a sample of 37 dwarf galaxies that show AGN ionisation signatures in spatially-resolved emission line diagnostic diagrams. The AGN signatures are largely missed by integrated emission line diagnostics for 23 of them. The bolometric luminosity of these 23 new AGN candidates is $\lesssim 10^{40}$ erg s$^{-1}$, fainter than that of single-fiber SDSS AGN, X-ray AGN, and radio AGN in dwarf galaxies, which stands IFU spectroscopy as a powerful tool for identifying hidden and faint AGN in dwarf galaxies. The AGN emission is in most cases offset from the optical center of the dwarf galaxy and shows a symmetric morphology, which indicates that either the AGN are off-nuclear, that the central emission of the galaxy is dominated by star formation, or that the AGN are turned-off and we are observing a past ionisation burst. One of the new AGN shows a broad H$α$ emission line component, from which we derive a black hole mass in the realm of intermediate-mass black holes. This constitutes the first hidden type 1 AGN discovered in a dwarf galaxy based on IFU spectroscopy. The finding of this sample of hidden and faint AGN has important implications for population studies of AGN in dwarf galaxies and for seed black hole formation models.
