Parkes observations for project P1281 semester 2023OCTS_06

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.

在过去十年间，快速射电暴（Fast Radio Bursts, FRBs）的物理起源始终是天文领域的核心争议议题之一，直至2020年人类探测到来自银河系磁星的明亮射电暴。此次银河系快速射电暴的发现证实，至少有部分微弱的快速射电暴可源自普通磁星。理论研究表明，年轻磁星能够产生射电波段存在持续辐射的星风云，但目前尚未在银河系磁星中观测到此现象。截至目前，已有两例活跃快速射电暴重复暴被证实与持续射电源相关联，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云。近期，研究人员在甚大阵巡天（VLA Sky Survey）中发现了特殊射电源VT 1137-0337。所有现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接收机（Parkes UWL receiver）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，持续射电源与快速射电暴的关联将得到极大强化，同时我们也能够直接揭示活跃快速射电暴重复暴的物理本质。