论文标题
从磁铁发出的静态软伽马射线发射的轴轴约束
Axion Constraints from Quiescent Soft Gamma-ray Emission from Magnetars
论文作者
论文摘要
从磁铁核心发出的轴突样粒子（ALP）可以在其磁层中转换为光子。所得的光子通量对$（i）$ a alp-nucleon耦合$ g_ {an} $的乘积敏感，该耦合控制了核心中的生产横截面和$（ii）$（ii）$ alp-photon耦合$ g_ {aγγ} $，以控制磁层的转换。我们研究了软γ射线范围（300 keV至1 MeV）中的这样的排放，其中预计将抑制来自共振的康普顿上散射的ALP光谱峰和天体物理背景。使用$ CGRO $ comptel和$ Integral $ spi/ibis/isgri获得的5个磁铁中发表的静态软伽马射线上限，我们对Alp-Nucleon和Alp-Photon couplings的产品限制了限制。我们还提供了详细研究结果对磁体核心温度的依赖性。我们进一步展示了我们对未来$ FERMI $ -GBM观察结果的预测。我们的结果激发了一项计划，该计划以$ fermi $ -GBM从磁铁中从磁铁中进行静止的软伽玛射线排放。
Axion-like-particles (ALPs) emitted from the core of a magnetar can convert to photons in its magnetosphere. The resulting photon flux is sensitive to the product of $(i)$ the ALP-nucleon coupling $G_{an}$ which controls the production cross section in the core and $(ii)$ the ALP-photon coupling $g_{aγγ}$ which controls the conversion in the magnetosphere. We study such emissions in the soft-gamma-ray range (300 keV to 1 MeV), where the ALP spectrum peaks and astrophysical backgrounds from resonant Compton upscattering are expected to be suppressed. Using published quiescent soft-gamma-ray flux upper limits in 5 magnetars obtained with $CGRO$ COMPTEL and $INTEGRAL$ SPI/IBIS/ISGRI, we put limits on the product of the ALP-nucleon and ALP-photon couplings. We also provide a detailed study of the dependence of our results on the magnetar core temperature. We further show projections of our result for future $Fermi$-GBM observations. Our results motivate a program of studying quiescent soft-gamma-ray emission from magnetars with the $Fermi$-GBM.
