论文标题
银河中心云的潮汐破坏造成的非热细丝
Nonthermal filaments from the tidal destruction of clouds in the Galactic center
论文作者
论文摘要
在银河中心附近观察到了近四十年，但它们的物理起源尚不清楚。在这里，我们研究了通过银河中心的重力破坏分子云而产生的NTF的可能性。我们表明，该模型预测了丝状结构的形成，其长度在数十个到数百个PC上，这是一个沿着灯丝轴的高度有序的磁场，并且有助于导致粒子加速的磁重新连接的条件。因此，该模型产生了NTF和相对论电子的观察到的磁性，而无需吸引偶极，$ \ sim $ mg，银河系磁场。由于云可以完全或部分中断，因此该模型提供了一种在某些情况下（但不是全部）中观察到的丝状结构和分子云之间联系的方法。
Synchrotron-emitting, nonthermal filaments (NTFs) have been observed near the Galactic center for nearly four decades, yet their physical origin remains unclear. Here we investigate the possibility that NTFs are produced by the destruction of molecular clouds by the gravitational potential of the Galactic center. We show that this model predicts the formation of a filamentary structure with length on the order of tens to hundreds of pc, a highly ordered magnetic field along the axis of the filament, and conditions conducive to magnetic reconnection that result in particle acceleration. This model therefore yields the observed magnetic properties of NTFs and a population of relativistic electrons, without the need to appeal to a dipolar, $\sim$ mG, Galactic magnetic field. As the clouds can be both completely or partially disrupted, this model provides a means of establishing the connection between filamentary structures and molecular clouds that is observed in some, but not all, cases.
