论文标题
从光学数据中利用轨道限制来检测二进制伽马射线脉冲星
Exploiting Orbital Constraints from Optical Data to Detect Binary Gamma-ray Pulsars
论文作者
论文摘要
很难通过其伽马射线发射发现脉冲星，因为电流仪器通常检测到每百万旋转的光子少于一个光子。这为孤立的脉冲星带来了重大的计算挑战，其中典型的参数搜索空间跨越四个维度。当脉冲星在二元系统中时，轨道运动引入了几个其他未知参数时，这甚至更加要求。在Pletsch＆Clark（Arxiv：1408.6962）的早期工作的基础上，我们提供了此类搜索的最佳方法。这些还可以在要搜索的参数空间上的外部约束，例如，从假定的二进制伴侣的光学观察中。该解决方案有两个部分。首先是通过参数空间度量标准在参数空间中构建最佳搜索网格，用于初始的半her搜索和随后的完全相干随访。第二个是解码和检测周期性脉动的方法。这些方法具有与传统的无线电搜索二进制脉冲星的敏感性不同，并且可能揭示新的脉冲星人群。
It is difficult to discover pulsars via their gamma-ray emission because current instruments typically detect fewer than one photon per million rotations. This creates a significant computing challenge for isolated pulsars, where the typical parameter search space spans wide ranges in four dimensions. It is even more demanding when the pulsar is in a binary system, where the orbital motion introduces several additional unknown parameters. Building on earlier work by Pletsch & Clark (arXiv:1408.6962), we present optimal methods for such searches. These can also incorporate external constraints on the parameter space to be searched, for example, from optical observations of a presumed binary companion. The solution has two parts. The first is the construction of optimal search grids in parameter space via a parameter-space metric, for initial semicoherent searches and subsequent fully coherent follow-ups. The second is a method to demodulate and detect the periodic pulsations. These methods have different sensitivity properties than traditional radio searches for binary pulsars and might unveil new populations of pulsars.
