Search for Axionic Dark Matter Using the Magnetar PSR J1745-2900.
Search for Axionic Dark Matter Using the Magnetar PSR J1745-2900.
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DOI：
10.1103/physrevlett.125.121103
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发表时间：
2020-08
影响因子：
8.6
通讯作者：
J. Darling
中科院分区：
文献类型：
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作者：
J. Darling
我们报告了利用从 Karl G. Jansky 甚大阵列（国家射电天文台是美国国家科学基金会的一个设施，根据联合大学公司的合作协议运营）获得的光谱，从银河中心磁星 PSR J1745-2900 的磁层中寻找暗物质轴子转换光子。没有检测到显着的光谱特征。使用 PSR J1745-2900 的混合模型和关于暗物质密度分布的规范假设，我们排除了轴子-光子耦合 g_{aγγ}>6-34×10^{-12} GeV^{-1} 的轴子模型，质量范围 4.2-8.4、18.6-26.9、33.0-41.4 的置信度为 95%， 53.7-62.1 和 126.0-159.3 μeV。如果存在暗物质尖点，则极限会降低到 g_{aγγ}>6-34×10^{-14} GeV^{-1}，这与观测到的质量范围 >33 μeV 的一些轴子模型重叠。这些限制可以通过模拟受激发射来改善，该受激发射可以促进轴子-光子转换过程。
We report on a search for dark matter axion conversion photons from the magnetosphere of the Galactic Center magnetar PSR J1745-2900 using spectra obtained from the Karl G. Jansky Very Large Array (the National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.). No significant spectral features are detected. Using a hybrid model for PSR J1745-2900 and canonical assumptions about the dark matter density profile, we exclude axion models with axion-photon coupling g_{aγγ}>6-34×10^{-12} GeV^{-1} with 95% confidence over the mass ranges 4.2-8.4, 18.6-26.9, 33.0-41.4, 53.7-62.1, and 126.0-159.3 μeV. If there is a dark matter cusp, the limits reduce to g_{aγγ}>6-34×10^{-14} GeV^{-1}, which overlap some axion models for the observed mass ranges >33 μeV. These limits may be improved by modeling the stimulated emission that can boost the axion-photon conversion process.