A simple optimization for the MeerKAT pulsar timing array

H. Middleton

doi:10.1093/mnras/staf748

2025-05-12

DOI：10.1093/mnras/staf748

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摘要

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MeerKAT射电望远镜的脉冲星计时阵列计划（MPTA）的目标是探测频率为纳赫兹的引力波（GWs）。近日，MPTA及多个其他脉冲星计时阵列（PTA）联盟宣布发现了此类信号的证据。在给定脉冲星阵列和观测策略的情况下，我们探讨了对观测计划进行小幅调整是否能为由大质量黑洞双星群体产生的随机引力波背景信号带来信噪比（S/N）的提升。我们的方法采用贪心算法，在阵列中的脉冲星之间重新分配可用的积分时间。整个用于MPTA观测的总时间保持不变，因此对当前观测策略的干扰最小。我们假设引力波信号与已报告的信号一致。为演示我们的方法，我们还对MPTA中脉冲星噪声特性做出了若干简化假设。在这些假设下，我们发现对观测计划进行小幅调整，可在10年PTA寿命期内使信噪比提升约20%。

Keyword:

gravitational waves

pulsars: general

期刊

Monthly Notices of the Royal Astronomical Society

IF:

4.8

论文数:

7.1W

被引数:

25.0W

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inaf osservatorio astron cagliari

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swinburne univ technol

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Max Planck Inst Radioastron

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