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Magnetic support of the optical emission line filaments in NGC 1275

机译：NGC 1275中光发射线灯丝的磁性支撑

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The giant elliptical galaxy NGC 1275, at the centre of the Perseus cluster, is surrounded by a well-known giant nebulosity of emission-line filaments, which are plausibly in excess of 10~8 years old. The filaments are dragged out from the centre of the galaxy by radio-emitting 'bubbles' rising buoyantly in the hot intracluster gas, before later falling back. They act as markers of the feedback process by which energy is transferred from the central massive black hole to the surrounding gas. The mechanism by which the filaments are stabilized against tidal shear and dissipation into the surrounding extremely hot (4 × 10~7 K) gas has been unclear. Here we report observations that resolve thread-like structures in the filaments. Some threads extend over 6 kpc, yet are only 70 pc wide. We conclude that magnetic fields in the threads, in pressure balance with the surrounding gas, stabilize the filaments, so allowing a large mass of cold gas to accumulate and delay star formation.
机译：珀尔修斯星团中心的巨大椭圆星系NGC 1275被发射线细丝的巨大星云所包围，发射线细丝的星云大概有10〜8年的历史。在炽热的团簇内部气体中，放射状上升的放射状“气泡”将细丝从银河系中心拉出，之后又回落。它们充当了反馈过程的标志，通过该过程能量从中央大质量黑洞转移到周围的气体中。稳定长丝抵抗潮汐剪切和消散到周围极热（4×10〜7 K）气体中的机制尚不清楚。在这里，我们报告的观察结果解决了细丝中的线状结构。有些线程的长度超过6 kpc，但只有70 pc宽。我们得出的结论是，线中的磁场与周围的气体保持压力平衡，使灯丝稳定，因此使大量的冷气积聚并延迟了恒星的形成。

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