论文标题
$θ$ - $θ$图：将脉冲星闪烁光谱转换为高度各向异性的星际散射屏幕上的坐标
The $θ$-$θ$ Diagram: Transforming pulsar scintillation spectra to coordinates on highly anisotropic interstellar scattering screens
论文作者
论文摘要
我们引入了一种新型的脉冲星二级光谱分析技术。脉冲星闪烁（称为“次级光谱”）的功率谱显示出由于从多路传播通过星际介质的干扰而引起的差异延迟和多普勒偏移。我们开发了一种转换，将这些可观察到的物品映射到单个变化材料的单个薄屏幕上的角度坐标。在此屏幕上图像的一维分布的情况下，这种转换是可能的，而没有变性，这通常是对现象的成功描述。次级光谱的双抛物线特征被转化为平行线性特征，我们详细描述了其属性。此外，我们介绍了通过将图像的观测应用于PSR B0834+06的观察来测量曲率参数和场幅度分布的方法。最后，我们将这种形式主义扩展到星际屏幕上图像的二维分布。
We introduce a novel analysis technique for pulsar secondary spectra. The power spectrum of pulsar scintillation (referred to as the "secondary spectrum") shows differential delays and Doppler shifts due to interference from multi-path propagation through the interstellar medium. We develop a transformation which maps these observables to angular coordinates on a single thin screen of phase-changing material. This transformation is possible without degeneracies in the case of a one-dimensional distribution of images on this screen, which is often a successful description of the phenomenon. The double parabolic features of secondary spectra are transformed into parallel linear features, whose properties we describe in detail. Furthermore, we introduce methods to measure the curvature parameter and the field amplitude distribution of images by applying them to observations of PSR B0834+06. Finally, we extend this formalism to two-dimensional distributions of images on the interstellar screen.
