论文标题
伽马射线仪的耀斑占空比及其对高能中微子排放的影响
Flare Duty Cycle of Gamma-Ray Blazars and Implications for High-Energy Neutrino Emission
论文作者
论文摘要
由于在从Blazar TXS 0506+056 at $ sim princeply中检测到高能中微子ICECUBE-170922A，因此，由于在Jet与光子中的高能量宇宙射线相互作用，可能伴随着高能中微子的伽玛射线，并伴有高能中微子。在这项工作中，我们介绍了从Blazars伽马射线发射的统计研究，以限制伽马射线对中微子产量的贡献。我们在{\ it fermi}大面积望远镜（LAT）监视的源列表中，每周为145个伽玛射线明亮的Blazars构建每周的binned Light曲线，添加了TXS 0506+056。我们得出了在耀斑状态（耀斑占空比）所花费的时间的比例，并且在每次耀斑中从光曲线带有贝叶斯块算法时释放的能量部分。我们发现，在我们的样本中，具有较低耀斑占用周期和能量分数的较低的大麻量更大。我们确定了在5〜 \％的显着性水平上，大副级别之间的耀斑占空环周期存在显着差异。然后，使用中微子和伽玛射线照明的一般缩放关系，$l_ν\ propto（l_γ）^γ$，加权指数为$γ= 1.0-2.0 $，标准化为静态的gamma-ray或X射线量或X射线量，每个blazar的中性gamma-ray磁通量，我们评估了每个glux g flux g flux flux flux flare flare。伽马射线耀斑分布表明，以$γ\ gtrsim1.5 $的价格，Blazar中微子的发射可能由耀斑主导。比较了一周和10年的垃圾箱的中微子能量与依赖性的ICECUBE敏感性，以限制伽马射线耀斑的标准中微子发射模型。最后，我们介绍了大型伽马射线耀斑对各向同性弥漫性中微子通量的上限贡献。
Gamma-ray flares of blazars may be accompanied by high-energy neutrinos due to interactions of high-energy cosmic rays in the jet with photons, as suggested by the detection of the high-energy neutrino IceCube-170922A during a major gamma-ray flare from blazar TXS 0506+056 at the $\sim3σ$ significance level. In this work, we present a statistical study of gamma-ray emission from blazars to constrain the contribution of gamma-ray flares to their neutrino output. We construct weekly binned light curves for 145 gamma-ray bright blazars in the {\it Fermi} Large Area Telescope (LAT) Monitored Source List adding TXS 0506+056. We derive the fraction of time spent in the flaring state (flare duty cycle) and the fraction of energy released during each flare from the light curves with a Bayesian blocks algorithm. We find that blazars with lower flare duty cycles and energy fractions are more numerous among our sample. We identify a significant difference in flare duty cycles between blazar sub-classes at a significance level of 5~\%. Then using a general scaling relation for the neutrino and gamma-ray luminosities, $L_ν \propto (L_γ)^γ$ with a weighting exponent of $γ = 1.0 - 2.0$, normalized to the quiescent gamma-ray or X-ray flux of each blazar, we evaluate the neutrino energy flux of each gamma-ray flare. The gamma-ray flare distribution indicates that blazar neutrino emission may be dominated by flares for $γ\gtrsim1.5$. The neutrino energy fluxes for one-week and 10-year bins are compared with the declination-dependent IceCube sensitivity to constrain the standard neutrino emission models for gamma-ray flares. Finally, we present the upper-limit contribution of blazar gamma-ray flares to the isotropic diffuse neutrino flux.
