论文标题
通过黑洞的光子环调度观察轴
Observing axions through photon ring dimming of black holes
论文作者
论文摘要
众所周知，由于重力强，磁场存在于黑洞附近，光子可以围绕黑洞围绕。利用这些事实，我们可以探测假设的伪尺寸颗粒，即所谓的轴。实际上，当光子在磁场中传播时，它们可以转换为轴。将这种光子转换为轴的转换导致黑洞阴影周围的光子环的变暗。我们表明，对于超级质量黑洞，光子环调度可以有效地发生。值得注意的是，事实证明，光子环的最大变暗速率为25％。在M87*的情况下，如果达到$ 10^{ - 5} $ arcsec的角度分辨率，则在X射线和伽马射线频带中观察到10％的变暗。频带和调光的大小取决于轴突 - 光子耦合和轴质量。因此，光子环的变形光谱为检测轴提供了一种新颖的工具。
It is known that magnetic fields exist near black holes and photons can go around black holes due to strong gravity. Utilizing these facts, we can probe hypothetical pseudoscalar particles, so-called axions. In fact, photons can be converted into axions when they propagate in a magnetic field. The conversion of such photons into axions leads to a dimming of the photon ring around the black hole shadow. We show that photon ring dimming can occur efficiently for supermassive black holes. Remarkably, it turns out that the maximal dimming rate of the photon ring is 25%. In the case of M87*, the dimming of 10% will be observed in the X-ray and gamma-ray bands if the angular resolution of $10^{-5}$ arcsec is achieved. The frequency band and the magnitude of the dimming depend on the axion-photon coupling and axion mass. Hence, the distorted spectrum of the photon ring provides a novel tool for detecting axions.
