A Bayesian approach to modelling multi-messenger emission from blazars using lepto-hadronic kinetic equations

Bruno Jimenez Fernandez; Hendrik Van Eerten

doi:10.1093/mnras/staa3163

A Bayesian approach to modelling multi-messenger emission from blazars using lepto-hadronic kinetic equations

Bruno Jimenez Fernandez, Hendrik Van Eerten

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3 Citations (SciVal)

Abstract

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 multimessenger 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.

Original language	English
Pages (from-to)	3613-3630
Number of pages	18
Journal	Monthly Notices of the Royal Astronomical Society
Volume	500
Issue number	3
Early online date	27 Nov 2020
DOIs	https://doi.org/10.1093/mnras/staa3163
Publication status	Published - 1 Jan 2021

Bibliographical note

Funding Information:
The authors would like to thank Matteo Cerruti and Anatoli Fedynitch for the valuable discussions about their models and Petar Mimica for hosting them during their meetings at the University of Valencia. BJF would also like to thank the late Cosmo the Cat for his support. BJF acknowledges funding from the Science and Technology Facilities Council (STFC) through a collaborative grant program between STFC and the Instituto de Astrofísica de Canarias (IAC). The authors gratefully acknowledge the anonymous referee for a constructive and thorough process that has significantly helped to improve the quality of the paper.

Publisher Copyright:
© 2021 Oxford University Press. All rights reserved.

Keywords

BL Lacertae objects: Individual: TXS 0506+056
Methods: Statistical
Neutrinos
Radiation mechanisms: non-thermal

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/staa3163

https://arxiv.org/abs/2006.01543

Cite this

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title = "A Bayesian approach to modelling multi-messenger emission from blazars using lepto-hadronic kinetic equations",

abstract = "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 multimessenger 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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A Bayesian approach to modelling multi-messenger emission from blazars using lepto-hadronic kinetic equations

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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