论文标题
CMB中轴支超平的烙印
Imprints of Axion Superradiance in the CMB
论文作者
论文摘要
光轴（$ M_A \ Lessim 10^{ - 10} $ eV）可以通过称为旋转级别的机制在迅速旋转的天体物理黑洞周围形成密集的云。轴和光子之间的耦合诱导了由轴云的刺激衰减引起的参数共振，该轴可以迅速将大轴数密度的区域迅速转化为低能光子的巨大通量。在这项工作中，我们考虑了经历共振衰减的超级轴云的现象学意义。我们表明，这些事件产生的低能光子将在宇宙学上很短的距离上吸收，可能会诱导大量的冲击波，从而在MPC尺度上加热和电离IgM。这些冲击波可能会以各向异性光谱扭曲或光学深度中的不均匀特征的形式留下可观察到的烙印。
Light axions ($m_a \lesssim 10^{-10}$ eV) can form dense clouds around rapidly rotating astrophysical black holes via a mechanism known as rotational superradiance. The coupling between axions and photons induces a parametric resonance, arising from the stimulated decay of the axion cloud, which can rapidly convert regions of large axion number densities into an enormous flux of low-energy photons. In this work we consider the phenomenological implications of a superradiant axion cloud undergoing resonant decay. We show that the low energy photons produced from such events will be absorbed over cosmologically short distances, potentially inducing massive shockwaves that heat and ionize the IGM over Mpc scales. These shockwaves may leave observable imprints in the form of anisotropic spectral distortions or inhomogeneous features in the optical depth.
