AI 中文总结
本研究针对PALFA巡天的12个源（含11个RRATs、1个FRB候选体）开展单脉冲分析，为5个源提供计时解，用贝叶斯框架拟合单脉冲能量分布，更新FRB候选体J0613+18为河外天体。
AI 中文摘要
旋转射电暂现源（RRATs）是仅能通过单条弥散射电脉冲被探测到的脉冲星，自被发现近二十年来，这类天体仍未被充分理解。与整体脉冲星群体相比，RRATs中很少有计时解，这限制了我们理解其 sporadic 辐射背后机制的能力。本研究对PALFA巡天中的12个源开展单脉冲分析，其中11个最初被识别为RRATs，1个为快速射电暴候选体。我们为5个在足够多历元被探测到的源提供了计时解，还为另外2个源给出了自转周期。对所有源，我们采用贝叶斯框架拟合单脉冲能量分布，发现支持对数正态能量分布，且脉冲间等待时间符合泊松过程。最后，我们更新了此前发表的快速射电暴候选体J0613+18的相关信息，新的迹象表明它实际位于河外。
英文摘要
Almost two decades after their discovery, pulsars discoverable only through their single, dispersed radio pulses, known as rotating radio transients (RRATS), remain a poorly-understood class of objects. Compared to the overall pulsar population, few have timing solutions, limiting our ability to understand the mechanisms underlying their sporadic emission. Here, we present a single-pulse analysis of twelve sources from the PALFA survey, consisting of eleven objects initially identified as RRATs and one candidate fast radio burst. We present timing solutions for five of the sources with detections at a sufficient number of epochs and spin periods for two more. For all sources, we use a Bayesian framework to fit distributions of single-pulse energies, finding support for log-normal energy distributions and pulse-to-pulse wait times that are consistent with Poisson processes. Finally, we provide updates on the previously-published candidate fast radio burst J0613+18, with new indications that it is in fact extragalactic.
Comments40 pages, 15 figures; submitted to ApJ
