Can we constrain the extragalactic magnetic field from very high energy observations of GRB 190114C?

Dzhatdoev, T.; Podlesnyi, E. I.; Vaiman, I. A.

doi:10.1103/physrevd.102.123017

Cited by 20 publications

(23 citation statements)

References 66 publications

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“…Ref. [227] performed a similar analysis for GRB 190114C using Monte Carlo simulations. They concluded that Fermi-LAT is not sensitive enough to detect the cascade signal from this GRB on time scales of one month.…”

Section: Analyses Of Individual Sourcesmentioning

confidence: 99%

“…Firstly, the former employed a simpler semi-analytical method, whereas the latter performed detailed Monte Carlo simulations using the three-dimensional version of the Elmag code. Moreover, the authors of [227] reconstructed the intrinsic spectrum following [254], while in Ref. [228] a fixed spectral index α = 2 (for a power-law distribution ∝ E −α ) was assumed.…”

Section: Analyses Of Individual Sourcesmentioning

confidence: 99%

“…Yet another difference is the treatment of the time information of the photons. While [227] accounted only for photons detected more than 62 s after the burst, [228] adopted 6 s. This issue is far from simple, as it requires knowledge of the inner workings of gamma-ray bursts. For further details, the interested reader is referred to the works on GRB 190114C by the MAGIC Collaboration [226,372].…”

Section: Analyses Of Individual Sourcesmentioning

confidence: 99%

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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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Section: Analyses Of Individual Sourcesmentioning

confidence: 99%

Section: Analyses Of Individual Sourcesmentioning

confidence: 99%

Section: Analyses Of Individual Sourcesmentioning

confidence: 99%

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The Gamma-ray Window to Intergalactic Magnetism

Batista

Saveliev

2021

Universe

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“…The observability of this intergalactic cascade signal from beamed sources strongly depends on the strength of the extragalactic magnetic field B EGMF and, under some circumstances, may also depend on its coherence length λ EGMF . The existing constraints on the (B EGMF ,λ EGMF ) parameters are poor [56][57][58][59][60][61][62].…”

Section: Intergalactic Electromagnetic Cascadesmentioning

confidence: 99%

Nonthermal Radiation of the Extreme TeV Blazar 1ES 0229+200 from Electromagnetic Cascades on Infrared Photon Field

2021

Self Cite

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Extreme TeV blazars (ETBs) are active galactic nuclei with jets presumably pointing towards the observer having their intrinsic (compensated for the effect of γ-ray absorption on extragalactic background light photons) spectral energy distributions (SEDs) peaked at an energy in excess of 1 TeV. These sources typically reveal relatively weak and slow variability as well as higher frequency of the low-energy SED peak compared to other classes of blazars. It proved to be exceedingly hard to incorporate all these peculiar properties of ETBs into the framework of conventional γ-ray emission models. ETB physics have recently attracted great attention in the astrophysical community, underlying the importance of the development of self-consistent ETB emission model(s). We propose a new scenario for the formation of X-ray and γ-ray spectra of ETBs assuming that electromagnetic cascades develop in the infrared photon field surrounding the central blazar engine. This scenario does not invoke compact fast-moving sources of radiation (so-called “blobs”), in agreement with the apparent absence of fast and strong variability of ETBs. For the case of the extreme TeV blazar 1ES 0229+200 we propose a specific emission model in the framework of the considered scenario. We demonstrate that this model allows to obtain a good fit to the measured SED of 1ES 0229+200.

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Section: Intergalactic Electromagnetic Cascadesmentioning

confidence: 99%

Nonthermal Radiation of the Extreme TeV Blazar 1ES 0229+200 from Electromagnetic Cascades on Infrared Photon Field

Dzhatdoev,

Galkin,

Podlesnyi

2021

Preprint

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Extreme TeV blazars (ETBs) are active galactic nuclei with jets presumably pointing towards the observer having their intrinsic spectral energy distributions (SEDs) peaked at an energy in excess of 1 TeV. These sources typically reveal relatively weak and slow variability as well as an extremely high frequency of the low-energy SED peak compared to other classes of blazars. It proved to be exceedingly hard to incorporate all these peculiar properties of ETBs into the framework of a reasonable γ-ray emission model. ETB physics have recently attracted great attention in the astrophysical community, underlying the importance of the development of self-consistent ETB emission model(s). We propose a new scenario for the formation of X-ray and γ-ray spectra of ETBs assuming that electromagnetic cascades develop in the infrared photon field surrounding the central blazar engine. This scenario does not invoke compact fast-moving sources of radiation (so-called "blobs"), in agreement with the apparent absence of fast and strong variability of ETBs. For the case of the extreme TeV blazar 1ES 0229+200 we propose a specific emission model in the framework of the considered scenario. We demonstrate that this model allows to obtain a good fit to the measured SED of 1ES 0229+200.

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Can we constrain the extragalactic magnetic field from very high energy observations of GRB 190114C?

Cited by 20 publications

References 66 publications

The Gamma-ray Window to Intergalactic Magnetism

The Gamma-ray Window to Intergalactic Magnetism

Nonthermal Radiation of the Extreme TeV Blazar 1ES 0229+200 from Electromagnetic Cascades on Infrared Photon Field

Nonthermal Radiation of the Extreme TeV Blazar 1ES 0229+200 from Electromagnetic Cascades on Infrared Photon Field

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