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 $g_{a\gamma \gamma }>6–34\times {10}^{-12}{\mathrm{GeV}}^{-1}$ with 95% confidence over the mass ranges 4.2–8.4, 18.6–26.9, 33.0–41.4, 53.7–62.1, and $126.0–159.3\mu \mathrm{eV}$. If there is a dark matter cusp, the limits reduce to $g_{a\gamma \gamma }>6–34\times {10}^{-14}{\mathrm{GeV}}^{-1}$, which overlap some axion models for the observed mass ranges $>33\mu \mathrm{eV}$. These limits may be improved by modeling the stimulated emission that can boost the axion-photon conversion process.

中文翻译：

---

使用电磁PSR J1745-2900搜索轴离暗物质

我们报告了使用从卡尔·G·詹斯基超大型阵列（国家射电天文台是国家科学基金会运营的设施）获得的光谱中，从银河中心磁星PSR J1745-2900的磁层中搜索暗物质轴突转换光子的报告。根据美国联合大学的合作协议）。没有检测到明显的光谱特征。使用针对PSR J1745-2900的混合模型以及关于暗物质密度分布的规范假设，我们排除了具有轴-光子耦合的轴模型$G_{\mathrm{一种}\gamma \gamma }>6–34\times {10}^{-12}{\mathrm{GeV}}^{-\mathrm{1个}}$ 对质量范围4.2-8.4、18.6-26.9、33.0-41.4、53.7-62.1和95％的置信度 $126.0–159.3\mu \mathrm{电子伏特}$。如果有暗物质的风口，则限制降低到$G_{\mathrm{一种}\gamma \gamma }>6–34\times {10}^{-14}{\mathrm{GeV}}^{-\mathrm{1个}}$，与观察到的质量范围的某些轴模型重叠 $>33\mu \mathrm{电子伏特}$。这些限制可以通过对受激发射进行建模来改善，该受激发射可以增强轴突-光子转换过程。