论文标题
银河晕磁场上的球状簇脉冲星的约束
Constraints from globular cluster pulsars on the magnetic field in the Galactic halo
论文作者
论文摘要
银河磁场在银河系的演变中起着重要作用，但其小规模行为仍然很众所周知。也未知是否渗透了银河系的光环。通过在光晕球簇47图卡纳中使用脉冲星观察，我们首次探测了Arcsecond尺度上的银河磁场，并在平行于视线的磁场的组件中发现了一个意外的大梯度。该梯度与垂直于银河盘的方向对齐，可以通过在球状簇内扩增至约60μg的磁场来解释。这种情况支持存在磁化流出的存在，该流出从银河磁盘延伸到光环，并与所研究的球状群集相互作用。
The Galactic magnetic field plays an important role in the evolution of the Galaxy, but its small-scale behaviour is still poorly known. It is also unknown whether it permeates the halo of the Galaxy or not. By using observations of pulsars in the halo globular cluster 47 Tucanae, we probed the Galactic magnetic field at arcsecond scales for the first time and discovered an unexpected large gradient in the component of the magnetic field parallel to the line of sight. This gradient is aligned with a direction perpendicular to the Galactic disk and could be explained by magnetic fields amplified to some 60 μG within the globular cluster. This scenario supports the existence of a magnetized outflow that extends from the Galactic disk to the halo and interacts with the studied globular cluster.
