论文标题
使用LWA1以低于100 MHz的频率检测PSR B1508+55中的回声
Detection of Echoes in PSR B1508+55 at frequencies below 100 MHz using the LWA1
论文作者
论文摘要
已知PSR B1508+55的单个组件轮廓高于300 MHz。但是，当我们使用长波长阵列的第一个站点以低于100 MHz的频率研究它时，它显示了多个组件。这些包括主脉冲，前体，后者和尾随组件。在三年研究的过程中，尾随成分与主要峰的分离发生了发展。这种进化可能是脉冲信号从电离气体云（充当晶状体）折射的效果，导致脉冲中的尾随成分随着Pulsar信号横穿星际介质。使用这种解释，我们确定影响脉冲轮廓的镜头的位置和电子密度。
PSR B1508+55 is known to have a single component profile above 300 MHz. However, when we study it at frequencies below 100 MHz using the first station of the Long Wavelength Array, it shows multiple components. These include the main pulse, a precursor, a postcursor, and a trailing component. The separation of the trailing component from the main peak evolves over the course of a three year study. This evolution is likely an effect of the pulse signal getting refracted off an ionized gas cloud (acting as a lens) leading to what appears to be a trailing component in the profile as the pulsar signal traverses the interstellar medium. Using this interpretation, we identify the location and electron density of the lens affecting the pulse profile.
