AI 中文总结
该研究论证了超大质量黑洞附近X射线与质子的Δ共振光生作用产生高能中微子的机制，提出γ射线被遮挡的活动星系是河外中微子和宇宙线的可能来源。
AI 中文摘要
基于活动星系NGC 1068和TXS 0506+056的观测，以及IceCube数据中出现的NGC 4151、CGCG 420-015、NGC 7469和 Circinus Galaxy这些源的额外证据，我们论证了在被稠密等离子体包围的超大质量黑洞的几个引力半径范围内产生高能中微子的情况。X射线是黑洞附近加速的质子产生中微子的靶标，同时也吸收了相同相互作用产生的中性π介子衰变的γ射线。能量为数十TeV及以上的中微子源于与能量为0.1~1 keV的X射线发生的Δ共振光生相互作用，即p + γ → Δ → n + π⁺。我们对多信使数据的分析表明，这些γ射线被遮挡的源具有特征性中微子通量，其与源自黑洞约10个引力半径范围内的X射线通量线性相关，且更倾向于较低值。我们推测这类源产生了河外起源的中微子和宇宙线的弥散通量。
英文摘要
Based on the observation of the active galaxies NGC 1068 and TXS 0506+056, and on additional evidence for the sources NGC 4151, CGCG 420-015, NGC 7469, and the Circinus Galaxy emerging from IceCube data, we make the case for the production of high-energy neutrinos within a few gravitational radii of supermassive black holes surrounded by a dense plasma radiating X-rays. X-rays represents the target for the production of neutrinos by protons accelerated near the black hole; they also absorb the gamma rays from the decay of neutral pions produced in the same interactions. Neutrinos with energies of tens of TeV and above originate in photoproduction interactions with X-rays of $0.1 \sim 1$\,keV energy on the $Δ$ resonance, $p + γ\rightarrow Δ\rightarrow n + π^+$. Our analysis of the multimessenger data points to gamma-ray-obscured sources with a characteristic neutrino flux linearly proportional to the X-ray flux originating within $\sim 10$ gravitational radii of the black holes, with lower values preferred. We speculate on such sources producing the diffuse flux of neutrinos and cosmic rays of extragalactic origin.
Comments16 pages, 8 figures
