等离子体不稳定性分裂轴子-光子转换线
Plasma instability splits axion-photon conversion lines
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中文总结 AI 辅助
本文研究轴子-光子转换在等离子体不稳定性下由单线分裂为多线，并指出蟹状星云脉冲星信号与此特征有定性相似但非证据。
中文摘要 AI 辅助
轴子与电磁学的耦合可能在天体物理光谱中留下性质不确定的印记；其中之一被认为是以轴子频率$\omega = \sqrt{\left(m_a c^2/\hbar\right)^2 + c^2 k_a^2}$为中心的单条谱线，其中$m_a c^2/\hbar$为轴子康普顿频率，$\hbar k_a$为其动量。如果参数等离子体不稳定性被激发，该印记将转化为一组谱线，这些谱线可能按比例间隔分布且为线性极化。蟹状星云脉冲星在接近近期宇宙学对轴子康普顿频率预测的频率处的信号与该印记具有某种定性相似性，尽管这种相似性并不能证明该信号由轴子引起。
英文摘要
The axion coupling to electromagnetism may leave signatures of uncertain nature in astrophysical spectra; one is thought to be a single line centered at the axion frequency $ω= \sqrt{\left(m_a c^2/\hbar\right)^2 + c^2 k_a^2}$, with $m_a c^2/\hbar$ the axion Compton frequency and $\hbar k_a$ its momentum. If a parametric plasma instability is excited, this signature is transformed into a set of lines, which may be proportionally spaced and linearly polarized. A Crab pulsar signal at a frequency near recent cosmological predictions for the axion Compton frequency has some qualitative similarity to this signature, though this similarity is not evidence that the signal is caused by axions.
发表机构
- University of Iowa（爱荷华大学）
- Flatiron Institute（平顿研究所）
机构由 AI 辅助整理，请以论文原文为准。
