论文标题
从积分/SPI衰减暗物质的新约束
New Constraints on Decaying Dark Matter from INTEGRAL/SPI
论文作者
论文摘要
基于高分辨率光谱仪SPI收集的近20年的数据，在国际伽马射线天体物理学实验室（积分）上，我们对腐烂的暗物质粒子构成了约束，在两个物体中腐烂，至少是一个光子，其中一个是一个光子，它通过狭窄的线样光谱特征表现出来。我们对银河系观察的开关类型分析使我们能够将生命限制为$ \ gtrsim 10^{20} -10^{21} $ yrs，用于具有质量$ 40 \，\ text {kev} {kev} \，<\，<\，<\，<在此质量范围内，我们的分析还揭示了在$ \ geq3σ$意义下检测到的32个类似线的特征，其中29个与已知的仪器和天体物理线相吻合。特别是，我们报告了对电子 - 静音歼灭（511 keV）和$^{26} $ al（1809 keV）线的检测，其空间剖面与文献中先前的结果一致。对于无菌中微子DM的特殊情况，我们报告了混合角度的限制，这是无菌中微子质量的函数。我们讨论了与强大的时间变量积分/SPI仪器背景相关的系统不确定性的主要影响，以及与MW DM密度谱测量值的不确定性相关的结果对派生结果的不确定性。
Based on almost 20 years of data collected by the high-resolution spectrometer SPI on board the International Gamma-Ray Astrophysics Laboratory (INTEGRAL) we present constraints on a decaying dark matter particle undergoing a decay into two bodies, at least one of which is a photon, manifesting itself via a narrow line-like spectral feature. Our ON-OFF type analysis of the Milky Way observations allowed us to constrain the lifetime to be $\gtrsim 10^{20}-10^{21}$ yrs for DM particles with masses $40\,\text{keV}\,<\,M_{\text{DM}}\,<\,14\,\text{MeV}$. Within this mass range our analysis also reveals 32 line-like features detected at $\geq 3σ$ significance, 29 of which coincide with known instrumental and astrophysical lines. In particular, we report on the detection of the electron-positron annihilation (511 keV) and $^{26}$Al (1809 keV) lines with spatial profiles consistent with previous results in the literature. For the particular case of the sterile neutrino DM we report the limits on the mixing angle as a function of sterile neutrino mass. We discuss the dominant impact of systematic uncertainties connected to the strongly time-variable INTEGRAL/SPI instrumental background as well as the ones connected to the uncertainties of MW DM density profile measurements on the derived results.
