发表机构
Smithsonian Astrophysical Observatory; Research School of Astronomy and Astrophysics, Australian National University; Astronomical Observatory of the Jagiellonian University; NASA-Goddard Space Flight Center; INAF Osservatorio Astronomico di Roma（史密森尼天体物理台; 澳大利亚国立大学天文与天体物理研究学院; 雅盖隆大学天文台; NASA戈达德太空飞行中心; 意大利国家天体物理研究所罗马天文台）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究利用三维诊断图分析九个赛弗特星系MUSE数据，发现恒星形成环、AGN双锥与中心激波的共同激发模式，强调激波在AGN反馈中的关键作用。
AI 中文摘要
星系的增长与其中心超大质量黑洞的增长密切相关，然而活动星系核（AGN）反馈对宿主星系恒星形成的净效应仍不确定。AGN可能增强、抑制或对恒星形成几乎没有可测量的影响，但要区分这些结果，需要将恒星形成和AGN光电离与激波激发分开，后者预期出现在AGN驱动的外流中，但一直难以单独分离。在此，我们将最近开发的理论三维诊断图（旨在分离恒星形成、AGN和激波激发）应用于对九个邻近（z < 0.026）2型赛弗特星系的VLT/MUSE IFU观测。我们在样本中发现了一种共同的激发模式：在投影半径r~0.8-6 kpc处存在恒星形成环或弧，AGN光电离的双锥延伸至kpc尺度，中心快速激波主导区域通常垂直于AGN双锥延伸，以及围绕中心快速激波并在恒星形成环内局部出现的纯激波主导区域。深度钱德拉X射线形态独立支持了这一分解。环核恒星形成环与棒驱动共振一致，尽管正AGN反馈也可能有所贡献。中心快速激波与AGN喷流-星际介质相互作用大致一致，而在低功率喷流星系中，AGN风-星际介质相互作用也可能发挥重要作用。这些结果确立了中心激波是赛弗特星系的共同特征，并证明了在AGN反馈研究中考虑激波激发的重要性。
英文摘要
The growth of galaxies and their central supermassive black holes is closely connected, yet the net effect of active galactic nuclei (AGN) feedback on host-galaxy star formation remains uncertain. AGN may enhance, suppress, or have little measurable impact on star formation, but distinguishing among these outcomes requires separating star-formation and AGN photoionization from shock excitation, which is expected in AGN-driven outflows but has been difficult to isolate. Here we apply a recently developed theoretical three-dimensional diagnostic diagram, designed to separate star formation, AGN, and shock excitation, to VLT/MUSE IFU observations of nine nearby (z < 0.026) Type 2 Seyfert galaxies. We find a common excitation pattern across the sample: star-forming rings or arcs at projected radii of r~0.8-6 kpc, AGN-photoionized bicones extending to kpc scales, central fast-shock-dominated regions that often extend perpendicular to the AGN bicone, and pure-shock- dominated regions surrounding the central fast shocks and appearing locally within the star-forming rings. Deep Chandra X-ray morphology independently supports this decomposition. The circumnuclear star-forming rings are consistent with bar-driven resonances, although positive AGN feedback may also contribute. The central fast shocks are broadly consistent with AGN jet-ISM interactions, while AGN wind-ISM interactions may also play an important role in galaxies with low-power jets. These results establish central shocks as a common feature of Seyfert galaxies and demonstrate the importance of accounting for shock excitation in AGN feedback studies.
Comments33 pages, 21 figures; published in ApJ
