基于国际脉冲星计时阵列的脉冲星时标
天体物理仪器与方法
2020-01-08 v1
摘要
我们基于国际脉冲星计时阵列(IPTA)首次数据发布中呈现的射电脉冲星观测，构建了一个新的时标TT(IPTA16)。我们使用了两种分析技术，它们对脉冲星观测的噪声模型给出独立估计，并采用不同算法获取脉冲星时标。两种分析在估计不确定度内一致，且都与TT(BIPM17)（由国际计量局(BIPM)产生的后修正时标）一致。我们表明，若TT(BIPM17)中存在显著误差，两种方法均能探测到。我们利用对美国海军天文台四台铷喷泉钟的观测，估计了导出TT(BIPM17)的原子钟的稳定性。将TT(IPTA16)的功率谱与这些喷泉钟的功率谱比较表明，在未来十年内，基于脉冲星的时标不太可能对最佳时标的稳定性有所贡献，但它们仍将是原子时标有价值的独立检验。我们还发现，基于脉冲星的时标的稳定性可能受限于我们对太阳系动力学的认知，且TT(BIPM17)中的误差不会成为IPTA主要目标（搜寻纳赫兹引力波特征）的限制因素。
引用
@article{arxiv.1910.13628,
title = {A pulsar-based timescale from the International Pulsar Timing Array},
author = {G. Hobbs and L. Guo and R. N. Caballero and W. Coles and K. J. Lee and R. N. Manchester and D. J. Reardon and D. Matsakis and M. L. Tong and Z. Arzoumanian and M. Bailes and C. G. Bassa and N. D. R. Bhat and A. Brazier and S. Burke-Spolaor and D. J. Champion and S. Chatterjee and I. Cognard and S. Dai and G. Desvignes and T. Dolch and R. D. Ferdman and E. Graikou and L. Guillemot and G. H. Janssen and M. J. Keith and M. Kerr and M. Kramer and M. T. Lam and K. Liu and A. Lyne and T. J. W. Lazio and R. Lynch and J. W. McKee and M. A. McLaughlin and C. M. F. Mingarelli and D. J. Nice and S. Oslowski and T. T. Pennucci and B. B. P. Perera and D. Perrodin and A. Possenti and C. J. Russell and S. Sanidas and A. Sesana and G. Shaifullah and R. M. Shannon and J. Simon and R. Spiewak and I. H. Stairs and B. W. Stappers and J. K. Swiggum and S. R. Taylor and G. Theureau and L. Toomey and R. van Haasteren and J. B. Wang and Y. Wang and X. J. Zhu},
journal= {arXiv preprint arXiv:1910.13628},
year = {2020}
}
备注
accepted by MNRAS