脉冲星计时阵列中的本征时间偏移
Proper Time Shifts in Pulsar Timing Arrays
浏览论文内容
中文总结 AI 辅助
本文为脉冲星计时阵列建立了规范不变的本征时间偏移框架，将其分解为多普勒、夏皮罗和爱因斯坦延迟，并提供计算残差的通用方法，可直接用于搜索新物理。
中文摘要 AI 辅助
脉冲星计时阵列是探测低频引力现象和标准模型之外物理的强有力工具。我们通过将可测量量确定为脉冲到达地球时连续脉冲之间的本征时间间隔，建立了计时残差的通用、规范不变框架。在线性化广义相对论中，我们推导了该本征时间偏移的通用表达式，并证明其可分解为多普勒、夏皮罗和爱因斯坦延迟贡献，其总和是规范不变的，类似于已为其他引力波探测器（如激光和原子干涉仪）开发的框架。我们还提供了一种针对任何指定扰动计算所得计时残差的方法，并用几个物理上动机良好的源说明了该方法，在文献中已有的地方恢复了已知结果。该方法可直接应用于使用现有数值软件从真实脉冲星计时数据中搜索新物理。
英文摘要
Pulsar timing arrays are a powerful tool for probing low-frequency gravitational phenomena and physics beyond the Standard Model. We establish a general, gauge-invariant framework for the timing residual by identifying the measurable quantity as the proper time interval between consecutive pulse arrivals at Earth. In linearized general relativity, we derive a general expression for this proper time shift and show that it decomposes into Doppler, Shapiro, and Einstein delay contributions whose sum is gauge invariant, similar to frameworks that have been developed for other gravitational-wave detectors such as laser and atom interferometers. We also provide a recipe for computing the resulting timing residual for any specified perturbation, and we illustrate the method with several physically well-motivated sources, recovering known results where they exist in the literature. This recipe can be directly applied to search for new physics from real pulsar timing data using existing numerical software.
发表机构
- University of California, Berkeley（加州大学伯克利分校）
- University of California, San Diego（加州大学圣地亚哥分校）
机构由 AI 辅助整理，请以论文原文为准。
