We present deep GALEX images of NGC 5128, the parent galaxy of Centaurus A. We detect a striking "weather ribbon" of Far-UV and H$α$ emission, which extends more than 35 kpc northeast of the galaxy. The ribbon is associated with a knotty ridge of radio/X-ray emission, and is an extension of the previously known string of optical emission-line filaments. Many phenomena in the region are too short-lived to have survived transit out from the inner galaxy; something must be driving them locally. We also detect Far-UV emission from the galaxy's central dust lane. Combining this with previous radio and Far-IR measurements, we infer an active starburst in the central galaxy, which is currently forming stars at $\sim 2 M_{sun}$yr$^{-1}$, and has been doing so for 50-100Myr. If the wind from this starburst is enhanced by energy and mass driven out from the AGN, the powerful augmented wind can be the driver needed for the northern weather system. We argue that both the diverse weather system, and the enhanced radio emission in the same region, result from the wind's encounter with cool gas left by one of the recent merger/encounter events in the history of NGC 5128.
Inefficient jet-induced star formation in Centaurus A: High resolution ALMA observations of the northern filaments
NGC 5128是研究本宇宙活动星系核反馈的最佳目标之一。在距离银河系13.5千秒差距处，最近恒星形成的光学细丝沿着射电喷流方向排列。它是一个正反馈（喷流诱导恒星形成）的试验台区域。APEX显示，在恒星形成区，但也在没有检测到恒星形成的示踪剂的地区有强烈的CO排放。当被观察到时，恒星的形成与肯尼卡特-施密特关系相比似乎是低效的。我们用ALMA方法在1.3”~ 23.8pc分辨率下绘制了12 CO（1-0）发射图。CO辐射呈团块状，分布在两个主要结构中：（i）HI云外的马蹄形复合体，那里的气体主要被激波激发，没有观察到恒星形成;（ii）HI壳边缘的垂直暗条，这是一个中等恒星形成的区域。我们识别出了140个分子云。一项统计研究表明，它们具有与银河系内部非常相似的物理特性。然而，目前的观测所能得到的半径范围并不能用来研究云是否遵循拉森关系。云的维里参数很大，表明重力并不占主导地位。最后，在暗条中注入的总能量与银河系内部的能量是相同的。在细丝中检测到的强CO发射表明，由射流注入的能量在致密分子气体的形成中起积极作用。相对较高的分子云维里参数表明，注入的动能太强，恒星形成效率不高。这是特别是在马蹄复杂的维里参数是最大的情况下，检测到强CO没有相关的恒星形成。这是AGN正反馈低效的第一个证据。
Discovery of a diffuse optical line emitting halo in the core of the Centaurus cluster of galaxies: Line emission outside the protection of the filaments
Far-infrared synchrotron properties of the inner lobes of the radio galaxy Centaurus A revealed with the Herschel observatory
Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)（宇宙科学研究所）；Department of Physics and Astronomy, Kwansei Gakuin University（关西学院大学物理与天文学系）；Division of Liberal Arts, Kogakuin University of Technology & Engineering（工机大学人文教育部）；National Astronomical Observatory of Japan（日本国立天文台）；Advanced Research Laboratories, Tokyo City University（东京都市大学先进研究实验室）；Department of Physics, Saitama University（埼玉大学物理学系）
MICONIC: JWST/MIRI-MRS reveals heavily reprocessed PAH emission in the circum-nuclear disc of Centaurus A
Universiteit Gent（根特大学）；KU Leuven（荷语鲁汶大学）；Sorbonne Université（索邦大学）；CNRS, UMR 7095, Institut d’Astrophysique de Paris（法国国家科学研究中心，UMR 7095，巴黎天文物理研究所）；Institut Universitaire de France（法兰西学院）；Centro de Astrobiología (CAB), CSIC-INTA（天体生物学中心（CAB），西班牙国家航空航天技术研究委员会-国家航空技术研究所）；University of Oxford（牛津大学）；Department of Physics, University of California, San Diego（加州大学圣地亚哥分校物理系）；Leiden Observatory, Leiden University（莱顿大学莱顿天文台）
