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arXiv 2501.00992hep-phastro-ph.GAgr-qchep-th
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来自星际介质加热的轴子-光子耦合的预测约束

Forecast constraints on the axion-photon coupling from interstellar medium heating

Makoto Amakawa, Tomohiro Fujita, Shinji Tsujikawa

AI总结:

该研究通过分析轴子暗物质与光子耦合引发的星际介质受迫共振加热效应,结合介质加热率不超过观测冷却率的条件,给出了不同背景磁场下轴子-光子耦合的预测约束,且磁场越强约束范围越宽、限制越严格。

摘要:

在以电子和重离子构成的非相对论等离子体为特征的星际介质中,我们研究了与光子耦合的轴子暗物质对电场动力学的影响。具体而言,我们假设存在沿特定方向排列的背景磁场。我们表明,受迫共振会引发能量从振荡的轴子场转移到光子,再转移到等离子体。当轴子质量$m_ϕ$等于等离子体频率$ω_p$时,这种共振最为显著。要求这种能量转移导致的星际介质加热率不超过观测到的天体物理冷却率,我们针对背景磁场$B_0$的几种不同振幅,给出了轴子-光子耦合$g$的预测约束。选取典型值$B_0=10^{-6}$高斯(G)时,我们发现在共振质量$m_ϕ=ω_p$处,$g$的上限比现有文献中其他测量得到的上限更严格。随着$B_0$取值增大,对于远离共振点的更宽轴子质量范围,都有可能对$g$施加更严格的约束。

英文摘要:

In interstellar media characterized by a nonrelativistic plasma of electrons and heavy ions, we study the effect of axion dark matter coupled to photons on the dynamics of an electric field. In particular, we assume the presence of a background magnetic field aligned in a specific direction. We show that there is an energy transfer from the oscillating axion field to photons and then to the plasma induced by forced resonance. This resonance is most prominent for the axion mass $m_ϕ$ equivalent to the plasma frequency $ω_p$. Requiring that the heating rate of the interstellar medium caused by the energy transfer does not exceed the observed astrophysical cooling rate, we place forecast constraints on the axion-photon coupling $g$ for several different amplitudes of the background magnetic field $B_0$. By choosing a typical value $B_0=10^{-6}$ G, we find that, for the resonance mass $m_ϕ=ω_p$, the upper limit of $g$ can be stronger than those derived from other measurements in the literature. With increased values of $B_0$, it is possible to put more stringent constraints on $g$ for a wider range of the axion mass away from the resonance point.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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