Parkes observations for project P1281 semester 2023OCTS_01

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是学界热议的未解难题，直至2020年人类探测到来自银河系磁星（magnetar）的明亮射电爆发。此次银河系快速射电暴的发现证实，至少部分微弱的快速射电暴可源自普通磁星。理论上，年轻磁星可产生射电波段具备持续发射特性的磁星星风星云（magnetar wind nebula），但目前尚未在银河系磁星中观测到此类结构。迄今为止，已有两例被证实与持续射电源相关联的活跃快速射电暴重复暴源，这类持续射电源被认为是快速射电暴前身天体附近的磁星星风星云。近期，研究人员在甚大阵巡天（VLA Sky Survey）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星云的起源。我们提议利用帕克斯超宽低频（UWL）接收机对该射电源开展观测，以搜寻可能存在的快速射电暂现源。若成功探测到此类信号，将极大地强化持续射电源与快速射电暴的关联证据，并可直接揭示活跃快速射电暴重复暴源的物理本质。