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arXiv 2006.01543astro-ph.HE
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用轻-强子动力学方程模拟Blazar多信使辐射的贝叶斯方法

A Bayesian Approach to Modelling Multi-Messenger Emission from Blazars using Lepto-Hadronic Kinetic Equations

Bruno Jiménez-Fernández, H. J. van Eerten

摘要:

Blazar TXS 0506+056是中微子和伽马射线耀斑事件的主要候选者。在本文中,我们提出了一个详细的动力学轻强子发射模型,能够产生一个光子和中微子谱给定的一组参数。我们的模型包括一系列的大尺度几何形状和动态和稳态注入模型的电子和质子。我们将此模型与马尔可夫链蒙特卡罗采样器相连接,以获得一个强大的统计工具,使我们能够拟合光谱能量分布并研究参数的概率密度函数和相关性。假设一个基准中微子通量,我们演示了如何多信使观测可以联合建模贝叶斯框架。我们为测试的模型的每个变体找到最佳参数,并报告它们的互相关。此外,我们确认,再生的中微子通量TXS 0506+056需要一个极端的质子电子比无论是在本地加速过程中,或从外部注入。

英文摘要:

Blazar TXS 0506+056 is the main candidate for a coincident neutrino and gamma-ray flare event. In this paper, we present 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.

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