Supermassive black holes and supernova explosions at the centres of active galaxies power cycles of outflowing and inflowing gas that affect galactic evolution and the overall structure of the Universe^1,2. While simulations and observations show that this must be the case, the range of physical scales (over ten orders of magnitude) and paucity of available tracers make both the simulation and observation of these effects difficult^3,4. By serendipity, there lies an active galaxy, Centaurus A (NGC 5128)^5,6, at such a close proximity as to allow its observation over this entire range of scales and across the entire electromagnetic spectrum. In the radio band, however, details on scales of 10–100 kpc from the supermassive black hole have so far been obscured by instrumental limitations^7,8. Here we report low-frequency radio observations that overcome these limitations and show evidence for a broad, bipolar outflow with velocity of 1,100 km s⁻¹ and mass-outflow rate of 2.9 M_⊙ yr⁻¹ on these scales. We combine our data with the plethora of multiscale, multi-wavelength, historical observations of Centaurus A to probe a unified view of feeding and feedback, which we show to be consistent with the chaotic cold accretion self-regulation scenario^9,10.

活动星系中心的超大质量黑洞和超新星爆炸影响星系演化和宇宙整体结构的流出和流入气体的动力循环^1,2。虽然模拟和观察表明必须如此，但物理尺度的范围（超过十个数量级）和可用示踪剂的缺乏使得这些影响的模拟和观察都变得困难^3,4。巧合的是，有一个活跃的星系，半人马座 A (NGC 5128) ^5,6，距离如此之近，以至于可以在整个尺度范围和整个电磁频谱上进行观察。然而，在无线电波段，来自超大质量黑洞的 10-100 kpc 尺度的细节迄今为止被仪器限制所掩盖^7,8。在这里，我们报告了克服这些限制的低频射电观测，并显示了速度为 1,100 km s ^-1和质量流出率为 2.9  M⊙  yr ^{-1的广泛双极流出的}_证据在这些尺度上。我们将我们的数据与过多的多尺度、多波长、对半人马座 A 的历史观测相结合，以探索喂养和反馈的统一视图，我们证明这与混沌冷积聚自我调节情景^9,10一致。