The intrinsic gamma-ray spectrum of TXS 0506+056: intergalactic propagation effects

Saveliev, Andrey; Batista, Rafael Alves

doi:10.1093/mnras/staa3403

Cited by 9 publications

(8 citation statements)

References 106 publications

(121 reference statements)

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“…Second, in the case of limitedduration transient events, part of the flux might only reach Earth millions of years later. Therefore, if IGMFs are stronger than B 10 −16 G, as the results [961,962] indicate, they need to be taken into account in the modelling, given their impact in the modelling of the propagation and their degeneracy with respect to the source properties [963,964].…”

Section: Effects Of Magnetic Fieldsmentioning

confidence: 99%

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Addazi,

Alvarez-Muniz,

Batista

et al. 2021

Preprint

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The exploration of the universe has recently entered a new era thanks to the multi-messenger paradigm, characterized by a continuous increase in the quantity and quality of experimental data that is obtained by the detection of the various cosmic messengers (photons, neutrinos, cosmic rays and gravitational waves) from numerous origins. They give us information about their sources in the universe and the properties of the intergalactic medium. Moreover, multi-messenger astronomy opens up the possibility to search for phenomenological signatures of quantum gravity. On the one hand, the most energetic events allow us to test our physical theories at energy regimes which are not directly accessible in accelerators; on the other hand, tiny effects in the propagation of very high energy particles could be amplified by cosmological distances. After decades of merely theoretical investigations, the possibility of obtaining phenomenological indications of Planck-scale effects is a revolutionary step in the quest for a quantum theory of gravity, but it requires cooperation between different communities of physicists (both theoretical and experimental). This review, prepared within the COST Action CA18108 "Quantum gravity phenomenology in the multi-messenger approach", is aimed at promoting this cooperation by giving a state-of-the art account of the interdisciplinary expertise that is needed in the effective search of quantum gravity footprints in the production, propagation and detection of cosmic messengers.

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Section: Effects Of Magnetic Fieldsmentioning

confidence: 99%

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Addazi,

Alvarez-Muniz,

Batista

et al. 2021

Preprint

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show abstract

“…This function is typically an exponential, log-parabola, or similar [235][236][237][238][239]. Interestingly, the value of E max that could be inferred with observations depends on the opacity of the Universe to gamma-ray propagation, i.e., the distribution of photon fields such as the EBL, as well as on the properties of the intervening IGMFs [240]. Cosmic-ray-induced electromagnetic cascades in the intergalactic medium may lead to observational signatures that resemble those initiated by gamma rays.…”

Section: Originmentioning

confidence: 99%

“…The authors showed that more than ∼ 60% of the Universe along the line of sight of this object have magnetic fields with strength B 10 −16 G. Interestingly, this analysis also showed that haloes can be used to probe the maximal energy of the gamma rays emitted by a source, E max (see Equation 9). In fact, there is a considerable correlation between the the value of E max that could be inferred from fits in the presence and in the absence of IGMFs [230].…”

Section: Analyses Of Individual Sourcesmentioning

confidence: 99%

The Gamma-ray Window to Intergalactic Magnetism

Batista

Saveliev

2021

Universe

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One of the most promising ways to probe intergalactic magnetic fields (IGMFs) is through gamma rays produced in electromagnetic cascades initiated by high-energy gamma rays or cosmic rays in the intergalactic space. Because the charged component of the cascade is sensitive to magnetic fields, gamma-ray observations of distant objects such as blazars can be used to constrain IGMF properties. Ground-based and space-borne gamma-ray telescopes deliver spectral, temporal, and angular information of high-energy gamma-ray sources, which carries imprints of the intervening magnetic fields. This provides insights into the nature of the processes that led to the creation of the first magnetic fields and into the phenomena that impacted their evolution. Here we provide a detailed description of how gamma-ray observations can be used to probe cosmic magnetism. We review the current status of this topic and discuss the prospects for measuring IGMFs with the next generation of gamma-ray observatories.

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“…With our statistical analysis we were able to analyze the influence of IGMFs on the inference of the intrinsic spectrum of gamma-ray sources [11]. For each magnetic field configuration described by and c , there is a preferred source model, i.e.…”

Section: Pos(icrc2021)994mentioning

confidence: 99%

“…We illustrate the method using the blazar TXS 0506+056. In particular, we derive limits on the correlation length of the magnetic field [10], and show the importance of taking into account IGMFs when determining intrinsic properties of gamma-ray sources [11].…”

Section: Introductionmentioning

confidence: 99%

Multimessenger Constraints on Intergalactic Magnetic Fields from Flaring Objects

Saveliev¹,

Batista²

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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The origin of magnetic fields in the Universe is an open problem. Seed magnetic fields possibly produced in early times may have survived up to the present day close to their original form, providing an untapped window to the primeval Universe. The recent observations of high-energy neutrinos from the blazar TXS 0506+056 in association with an electromagnetic counterpart in a broad range of wavelengths can be used to probe intrinsic properties of this object and the traversed medium. Here we show that intergalactic magnetic fields (IGMFs) can affect the intrinsic spectral properties of this object reconstructed from observations. In particular, we point out that the reconstructed maximum gamma-ray energy of TXS 0506+056 can be significantly higher if IGMFs are strong. Finally, we use this flare to constrain both the magnetic-field strength and the coherence length of IGMFs.

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The intrinsic gamma-ray spectrum of TXS 0506+056: intergalactic propagation effects

Cited by 9 publications

References 106 publications

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

The Gamma-ray Window to Intergalactic Magnetism

Multimessenger Constraints on Intergalactic Magnetic Fields from Flaring Objects

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