Parkes observations for project P1281 semester 2023OCTS_17

The physical origins of Fast Radio Bursts (FRBs) have been highly debated in the past decade, until a bright radio burst from the Galactic magnetar was detected in 2020. The discovery of Galactic FRB has proved that at least some faint FRBs can originate from normal magnetars. Theoretically, young magnetar can give rise to wind nebula with persistent emission in radio band, while it has not been observed among the Galactic magnetars yet. So far, there are two active FRB repeaters confirmed to be associated with persistent radio sources, which are thought to be magnetar wind nebulae near the FRB progenitors. Recently, a special radio source, VT 1137-0337, was discovered in the VLA Sky Survey. All the observational facts strongly indicate its origin of magnetar wind nebula. We propose to observe this radio source with the Parkes UWL receiver to search for possible fast radio transients. If detection made, the PRS-FRB association would be strengthened deeply, and we would be able to directly uncover the nature of active repeaters.

快速射电暴（Fast Radio Bursts, FRBs）的物理起源在过去十年间始终存在广泛学术争议，直至2020年人类探测到来自银河系磁星（magnetar）的明亮射电暴。此次银河系FRB的发现证实，至少有一部分微弱的快速射电暴可源自普通磁星。理论上，年轻磁星可产生具备射电波段持续辐射的磁星星风云（magnetar wind nebula），但此前尚未在银河系磁星中观测到此类结构。截至目前，已有两例活跃FRB复现源被证实与持续射电源相关联，这类持续射电源被认为是FRB前身天体（FRB progenitors）附近的磁星星风云。近期，研究人员在甚大阵（Very Large Array, VLA）巡天项目中发现了一个特殊射电源VT 1137-0337，所有观测证据均强烈指向其磁星星风云起源。我们提议利用帕克斯UWL（Ultra-Wideband）接收机对该射电源开展观测，以搜寻潜在的快速射电暂现源。若成功探测到此类信号，将极大强化PRS-FRB的关联证据，并使我们能够直接揭示活跃复现源的物理本质。