吸积轴子云的动力学与频率转换
Dynamics and Frequency Conversion of Accreting Axion Clouds
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University（上海交大凌波书院）
- Shanghai Jiao Tong University（上海交通大学）
- Sapienza Università di Roma（罗马第一大学）
- INFN, Sezione di Roma（意大利国家核物理研究所罗马分所）
- The Hong Kong University of Science and Technology（香港科技大学）
- Kyoto University（京都大学）
- Niels Bohr Institute（尼尔斯·玻尔研究所）
- Universidade de Lisboa – UL（里斯本大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
该研究分析了致密天体周围吸积轴子云的两种晚期演化 regime，发现饱和 regime 下的轴子辐射具有稳定离散谱线，不同轴子势对应不同发射谱，可通过地面探测轴子流研究轴子自相互作用结构及其紫外完备性。
AI中文摘要：
轴子场可通过环境轴子波的自相互作用驱动弛豫，在致密天体周围形成指数增长的引力束缚云。当场振幅趋近于轴子衰变常数时，非线性效应变得重要。我们确定了由引力精细结构常数和云增长速率决定的两种截然不同的晚期演化 regime：一种是玻色新星（Bosenova） regime，特征是坍缩伴随爆发性轴子喷流；另一种是饱和 regime，其中自相互作用诱导的轴子发射与吸积达到平衡。在后一 regime 中，发射的轴子辐射在束缚态能量的奇数倍处呈现稳定的离散谱线，可直接探测轴子势在二次极小值之外的全局结构。我们表明，单余弦势与类量子色动力学轴子势会预测出不同的发射谱，通过对来自致密天体的相对论轴子流进行地面探测，可实现对潜在轴子自相互作用结构及其紫外完备性的探测。
英文摘要：
Axion fields can form exponentially growing gravitational clouds around compact objects through self-interaction-driven relaxation of ambient axion waves. As the field amplitude approaches the axion decay constant, nonlinear effects become important. We identify two distinct regimes of late-time evolution, determined by the gravitational fine-structure constant and the cloud growth rate: a Bosenova regime, characterized by collapse accompanied by explosive axion bursts, and a saturation regime, in which self-interaction-induced axion emission balances accretion. In the latter regime, the emitted axion radiation exhibits stable discrete spectral lines at odd multiples of the bound-state energy, directly probing the global structure of the axion potential beyond its quadratic minimum. We show that single-cosine potentials and QCD axion-like potentials predict distinct emission spectra, enabling probes of the underlying axion self-interaction structure and its ultraviolet completion through terrestrial detection of relativistic axion fluxes from compact objects.
