标题： 重复快速射电暴源的偏振角摆动多样性 显示英文标题

标题： Diverse polarization angle swings from a repeating fast radio burst source

摘要： 快速射电暴（FRBs）是未知起源的以毫秒为单位持续时间的射电瞬变现象。能够从FRBs产生极高相干辐射的两种可能机制分别涉及中子星磁层或远离中心能源源的相对论冲击波。详细的偏振观测或许有助于我们理解这种辐射机制。然而，现有的FRB偏振数据令人困惑，因为它们表现出多种偏振属性，包括一些重复事件在整个爆发过程中具有恒定的偏振角，或者在某些看似单次事件中具有变化的偏振角。在此，我们报告了来自FRB 180301的15个爆发的观测结果，并发现其中七个爆发存在各种偏振角摆动现象。这些爆发的偏振角特征多样性与无线电辐射的磁层起源一致，而不支持涉及相对论冲击波的辐射模型。 显示英文摘要

摘要： Fast radio bursts (FRBs) are millisecond-duration radio transients of unknown origin. Two possible mechanisms that could generate extremely coherent emission from FRBs invoke neutron star magnetospheres or relativistic shocks far from the central energy source. Detailed polarization observations may help us to understand the emission mechanism. However, the available FRB polarization data have been perplexing, because they show a host of polarimetric properties, including either a constant polarization angle during each burst for some repeaters or variable polarization angles in some other apparently one-off events. Here we report observations of 15 bursts from FRB 180301 and find various polarization angle swings in seven of them. The diversity of the polarization angle features of these bursts is consistent with a magnetospheric origin of the radio emission, and disfavours the radiation models invoking relativistic shocks.