Ultralight Dark Matter Resonates with Binary Pulsars.
Ultralight Dark Matter Resonates with Binary Pulsars.
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超轻暗物质与二元脉冲星共振。
DOI：
10.1103/physrevlett.118.261102
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发表时间：
2016
影响因子：
8.6
通讯作者：
S. Sibiryakov
中科院分区：
文献类型：
--
作者：
D. Blas;D. L. Nacir;S. Sibiryakov
我们考虑的情况下，暗物质（DM）是由一个超轻经典标量场执行相干周期振荡。我们指出，这样的DM扰动的动力学的二元系统通过其引力场或通过直接耦合到普通物质。如果DM振荡的频率接近于系统的轨道频率的（半）整数倍，则这种扰动被共振放大，并导致轨道周期的长期变化。我们建议使用双星作为这种情况下的探测器，并估计其灵敏度。虽然目前的观测精度还不足以探测DM的纯引力效应，但它已经产生了与其他边界竞争的直接耦合约束。灵敏度将随着即将到来的无线电观测站（如平方公里阵列）而增加。
We consider the scenario where dark matter (DM) is represented by an ultralight classical scalar field performing coherent periodic oscillations. We point out that such DM perturbs the dynamics of binary systems either through its gravitational field or via direct coupling to ordinary matter. This perturbation gets resonantly amplified if the frequency of DM oscillations is close to a (half-)integer multiple of the orbital frequency of the system and leads to a secular variation of the orbital period. We suggest using binary pulsars as probes of this scenario and estimate their sensitivity. While the current accuracy of observations is not yet sufficient to probe the purely gravitational effect of DM, it already yields constraints on direct coupling that are competitive with other bounds. The sensitivity will increase with the upcoming radio observatories such as the Square Kilometer Array.
影响因子：
8.6
作者：
Ken Van Tilburg;N. Leefer;L. Bougas;D. Budker
通讯作者：
Ken Van Tilburg;N. Leefer;L. Bougas;D. Budker
影响因子：
5
作者：
Arvanitaki, Asimina;Graham, Peter W.;Van Tilburg, Ken
通讯作者：
Van Tilburg, Ken