Theoretical Aspects of High Energy Neutrinos and GRB

Mészáros, P.; Razzaque, S.

doi:10.1142/9789812708342_0009

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…We have also plotted the GZK neutrino flux from [35] GeV. If we compare our derived neutrino spectra from HL GRBs with some of the previous results [4] the width of the intermediate region between the two break energies is narrower. This is because we have used the muon cooling energy instead of the pion cooling energy in determining the second break energy of the spectra to avoid overestimation of neutrino fluxes.…”

Section: Resultsmentioning

confidence: 81%

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Neutrino spectra from low and high luminosity populations of gamma ray bursts

Gupta

Zhang

2007

Astroparticle Physics

106

115

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The detection of GRB 060218 at z=0.033 by Swift within 1.5 years of operation, together with the detection of GRB 980425 at z = 0.0085 by BeppoSAX, suggest that these low-luminosity (LL) GRBs have a much higher event rate than the canonical high-luminosity (HL) GRBs, and they form a distinct new component in the GRB luminosity function. We explore the contribution of this previously neglected GRB population to the diffuse neutrino background within the internal shock model and compare it with that of the canonical HL population. By considering a wide range of distributions of various parameters (e.g. luminosity, spectral break energy, duration, variability time, Lorentz factor, redshift) for both populations, we find that although it is difficult to detect neutrinos from the individual LL GRBs, the contribution of the LL population to the diffuse neutrino background is more than the HL population above about 10 8 GeV.

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Section: Resultsmentioning

confidence: 81%

“…The possibility of high energy neutrino emission from GRBs in the burst and the afterglow phases has been studied earlier by different groups [1,2,3,4]. It has been found that only the nearby high luminosity (HL) GRBs (e.g.…”

Section: Introductionmentioning

confidence: 99%

Neutrino spectra from low and high luminosity populations of gamma ray bursts

Gupta

Zhang

2007

Astroparticle Physics

106

115

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“…In the present work, we have assumed that the UHE AGN neutrino flux accounts for all of the UHE neutrino flux. This is, of course, a simplifying assumption, since high-energy contributions could also originate at other types of sources, such as gamma-ray bursts [33][34][35][36].…”

Section: Current and Preliminary Bounds On The Neutrino Fluxmentioning

confidence: 99%

IceCube expectations for two high-energy neutrino production models at active galactic nuclei

Argüelles

Bustamante

Gago

2010

J. Cosmol. Astropart. Phys.

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We have determined the currently allowed regions of the parameter spaces of two representative models of diffuse neutrino flux from active galactic nuclei (AGN): one by Koers & Tinyakov (KT) and another by Becker & Biermann (BB). Our observable has been the number of upgoing muon-neutrinos expected in the 86-string IceCube detector, after 5 years of exposure, in the range 10 5 ≤ E ν /GeV ≤ 10 8 . We have used the latest estimated discovery potential of the IceCube-86 array at the 5σ level to determine the lower boundary of the regions, while for the upper boundary we have used either the AMANDA upper bound on the neutrino flux or the more recent preliminary upper bound given by the half-completed IceCube-40 array (IC40). We have varied the spectral index of the proposed power-law fluxes, α, and two parameters of the BB model: the ratio between the boost factors of neutrinos and cosmic rays, Γ ν /Γ CR , and the maximum redshift of the sources that contribute to the cosmic-ray flux, z max CR . For the KT model, we have considered two scenarios: one in which the number density of AGN does not evolve with redshift and another in which it evolves strongly, following the star formation rate. Using the IC40 upper bound, we have found that the models are visible in IceCube-86 only inside very thin strips of parameter space and that both of them are discarded at the preferred value of α = 2.7 obtained from fits to cosmic-ray data. Lower values of α, notably the values 2.0 and 2.3 proposed in the literature, fare better. In addition, we have analysed the capacity of IceCube-86 to discriminate between the models within the small regions of parameter space where both of them give testable predictions. Within these regions, discrimination at the 5σ level or more is guaranteed.

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Perspectives in gamma-ray burst science

2009

Gamma-Ray Bursts

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Theoretical Aspects of High Energy Neutrinos and GRB

Cited by 5 publications

References 28 publications

Neutrino spectra from low and high luminosity populations of gamma ray bursts

Neutrino spectra from low and high luminosity populations of gamma ray bursts

IceCube expectations for two high-energy neutrino production models at active galactic nuclei

Perspectives in gamma-ray burst science

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