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arXiv 2008.13052astro-ph.GAastro-ph.COastro-ph.HEhep-ph
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基于毫秒脉冲星计时的Milky Way加速度计

Milky Way Accelerometry via Millisecond Pulsar Timing

David F. Phillips, Aakash Ravi, Reza Ebadi, Ronald L. Walsworth

摘要:

毫秒钟的时间稳定性是显著的,在长时间尺度上甚至可以与一些地球上的原子钟相媲美。利用这一特性,我们表明,毫秒的星系分布在银河系附近的加速计形成一个合奏,我们可以直接提取本地银河系加速度。从脉冲星自旋周期的测量,我们证明了约1 $σ$精度使用117个脉冲星的加速度灵敏度。我们还提出了一个互补的分析结果,使用轨道周期的13个二元脉冲星系统,消除系统与脉冲星制动。这项工作是动态测量加速度梯度的第一步,最终将告诉我们银河系中的暗物质密度分布。

英文摘要:

The temporal stability of millisecond pulsars is remarkable, rivaling even some terrestrial atomic clocks at long timescales. Using this property, we show that millisecond pulsars distributed in the galactic neighborhood form an ensemble of accelerometers from which we can directly extract the local galactic acceleration. From pulsar spin period measurements, we demonstrate acceleration sensitivity with about 1$σ$ precision using 117 pulsars. We also present results from a complementary analysis using orbital periods of 13 binary pulsar systems that eliminates systematics associated with pulsar braking. This work is a first step toward dynamically measuring acceleration gradients that will eventually inform us about the dark matter density distribution in the Milky Way galaxy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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