论文标题
银河系加速度计通过毫秒脉冲星的计时
Milky Way Accelerometry via Millisecond Pulsar Timing
论文作者
论文摘要
毫秒脉冲星的时间稳定性非常出色，即使在长时间尺度上，甚至有些陆生原子钟也与之抗衡。使用此特性，我们表明在银河邻域中分布的毫秒脉冲星形成了加速度计的集合，我们可以直接从中提取局部银河加速度。从Pulsar自旋时期测量值中，我们使用117个脉冲星证明了大约1 $σ$精度的加速度灵敏度。我们还使用13个二元脉冲星系统的轨道周期进行了互补分析的结果，从而消除了与脉冲星制动相关的系统学。这项工作是迈向动态测量加速度梯度的第一步，最终将向我们告知银河系中的暗物质密度分布。
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.
