NANOGrav 11 年数据集：45 颗毫秒脉冲星的高精度计时
高能天体物理现象
2018-04-12 v3 天体物理仪器与方法
摘要
我们呈现了作为北美纳赫兹引力波天文台（NANOGrav）项目一部分观测的 45 颗毫秒脉冲星长达 11 年的高精度计时数据，该项目旨在探测并刻画低频引力波。这些脉冲星在 327 MHz 至 2.3 GHz 的频率范围内使用阿雷西博天文台和/或绿岸望远镜进行观测。大多数脉冲星以约每月的节奏观测，六颗高计时精度脉冲星每周观测，且所有脉冲星在每个观测历元均以宽分离频率观测，以拟合时变色散延迟。我们描述了数据处理、到达时间（TOA）计算以及一种用于剔除离群 TOA 的新的自动化方法之实现。我们为每颗脉冲星拟合一个计时模型，包含自转、天体测量参数，必要时含双星参数，此外还有时变色散延迟与量化脉冲轮廓随频率演化的参数。新计时解提供了三项新视差测量、两项新 Shapiro 延迟测量以及两项大轨道周期变化的新测量。我们拟合刻画每颗脉冲星噪声源的模型。我们发现 11 颗脉冲星呈现显著红噪声，其谱指数通常小于非回收脉冲星的典型测量值，可能暗示不同起源。后续论文将利用这些数据约束或探测引力波信号的 signatures。
引用
@article{arxiv.1801.01837,
title = {The NANOGrav 11-year Data Set: High-precision timing of 45 Millisecond Pulsars},
author = {Zaven Arzoumanian and Adam Brazier and Sarah Burke-Spolaor and Sydney Chamberlin and Shami Chatterjee and Brian Christy and James M. Cordes and Neil J. Cornish and Fronefield Crawford and H. Thankful Cromartie and Kathryn Crowter and Megan E. DeCesar and Paul B. Demorest and Timothy Dolch and Justin A. Ellis and Robert D. Ferdman and Elizabeth C. Ferrara and Emmanuel Fonseca and Nathan Garver-Daniels and Peter A. Gentile and Daniel Halmrast and Eliu Huerta and Fredrick A. Jenet and Cody Jessup and Glenn Jones and Megan L. Jones and David L. Kaplan and Michael T. Lam and T. Joseph W. Lazio and Lina Levin and Andrea Lommen and Duncan R. Lorimer and Jing Luo and Ryan S. Lynch and Dustin Madison and Allison M. Matthews and Maura A. McLaughlin and Sean T. McWilliams and Chiara Mingarelli and Cherry Ng and David J. Nice and Timothy T. Pennucci and Scott M. Ransom and Paul S. Ray and Xavier Siemens and Joseph Simon and Renee Spiewak and Ingrid H. Stairs and Daniel R. Stinebring and Kevin Stovall and Joseph K. Swiggum and Stephen R. Taylor and Michele Vallisneri and Rutger van Haasteren and Sarah J. Vigeland and Weiwei Zhu},
journal= {arXiv preprint arXiv:1801.01837},
year = {2018}
}
备注
Published in the Astrophysical Journal Supplement Series