标题： 利用明亮脉冲星B1133+16的闪烁探测局部星际介质 显示英文标题

标题： Probing the local interstellar medium with scintillometry of the bright pulsar B1133+16

摘要： 星际介质中存在一群散射屏，其中大多数的起源未知。脉冲星闪烁研究为分辨这些散射屏并测量它们的特性提供了一种灵敏的工具。本文中，我们报告了对阿雷西博天文台34年来对PSR B1133+16的观测分析，从中我们获得了高质量的动力谱及其相关的闪烁弧，这些弧线是由位于脉冲星视线方向上的散射屏造成的。我们已经识别出了六个单独的散射屏，它们负责产生所观察到的持续数十年的闪烁弧。利用假设这些散射屏在这段时间内没有发生显著变化，我们对地球轨道上弧线曲率的变化进行了建模，并提取了关于五个散射屏的位置、方向和速度的信息，其中精度最高的距离测量将一个屏定位在距离地球仅$5.46^{+0.54}_{-0.59}$光年的地方。我们将更远的这些屏与本地泡的一个低密度区域联系起来。 显示英文摘要

摘要： The interstellar medium hosts a population of scattering screens, most of unknown origin. Scintillation studies of pulsars provides a sensitive tool for resolving these scattering screens and a means of measuring their properties. In this paper, we report our analysis of 34 years of Arecibo observations of PSR B1133+16, from which we have obtained high-quality dynamic spectra and their associated scintillation arcs, arising from the scattering screens located along the line of sight to the pulsar. We have identified six individual scattering screens that are responsible for the observed scintillation arcs, which persist for decades. Using the assumption that the scattering screens have not changed significantly in this time, we have modeled the variations in arc curvature throughout the Earth's orbit and extracted information about the placement, orientation, and velocity of five of the six screens, with the highest-precision distance measurement placing a screen at just $5.46^{+0.54}_{-0.59}$ pc from the Earth. We associate the more distant of these screens with an under-dense region of the Local Bubble.