A Bayesian approach to modelling multimessenger emission from blazars using lepto-hadronic kinetic equations
A Bayesian approach to modelling multimessenger emission from blazars using lepto-hadronic kinetic equations
复制标题
DOI：
10.1093/mnras/staa3163
复制
发表时间：
2020-06
期刊：
影响因子：
--
通讯作者：
Bruno Jim'enez-Fern'andez;H. van Eerten-H.-van Eerten-2125930852
中科院分区：
文献类型：
--
作者：
Bruno Jim'enez-Fern'andez;H. van Eerten-H.-van Eerten-2125930852
Blazar TXS0506+056是中微子和伽马射线耀斑重合事件的主要候选者。在这篇文章中，我们组成了一个详细的动力学轻子-强子发射模型，能够在给定一组参数的情况下产生光子和中微子光谱。我们的模型包括一系列大尺度几何结构以及电子和质子的动态和稳态注入模型。我们将该模型与马尔可夫链蒙特卡罗采样器相结合，获得了一个强大的统计工具，使我们既可以对谱能量分布进行拟合，又可以研究参数的概率密度函数和关联。假设一个基准中微子流，我们演示了如何在贝叶斯框架中联合模拟多信使观测。我们为测试的模型的每一种变体找到最佳参数，并报告它们的交叉相关性。此外，我们还证实，要再现TXS 0506+056的中微子通量，无论是在局部加速过程中，还是在外部注入过程中，都需要一个极端的质子电子比。
Abstract Blazar TXS 0506+056 is the main candidate for a coincident neutrino and gamma-ray flare event. In this paper, we compose a detailed kinetic lepto-hadronic emission model capable of producing a photon and neutrino spectrum given a set of parameters. Our model includes a range of large-scale geometries and both dynamical and steady-state injection models for electrons and protons. We link this model with a Markov Chain Monte Carlo sampler to obtain a powerful statistical tool that allows us to both fit the Spectral Energy Distribution and study the probability density functions and correlations of the parameters. Assuming a fiducial neutrino flux, we demonstrate how multi-messenger observations can be modelled jointly in a Bayesian framework. We find the best parameters for each of the variants of the model tested and report on their cross-correlations. Additionally, we confirm that reproducing the neutrino flux of TXS 0506+056 requires an extreme proton to electron ratio either in the local acceleration process or from external injection.