High energy neutrino early afterglows from gamma-ray bursts revisited

Abstract

The high energy neutrino emission from gamma-ray bursts (GRBs) has been expected in various scenarios. In this paper, we study the neutrino emission from early afterglows of GRBs, especially under the reverse-forward shock model and late prompt emission model. In the former model, the early afterglow emission occurs due to dissipation made by an external shock with the circumburst medium (CBM). In the latter model, internal dissipation such as internal shocks produces the shallow decay emission in early afterglows. We also discuss implications of recent Swift observations for neutrino signals in detail. Future neutrino detectors such as IceCube may detect neutrino signals from early afterglows, especially under the late prompt emission model, while the detection would be difficult under the reverse-forward shock model. Contribution to the neutrino background from the early afterglow emission may be at most comparable to that from the prompt emission unless the outflow making the early afterglow emission loads more nonthermal protons, and it may be important in the very high energies. Neutrino-detections are inviting because they could provide us with not only information on baryon acceleration but also one of the clues to the model of early afterglows. Finally, we compare various predictions for the neutrino background from GRBs, which are testable by future neutrino-observations.

18 pages, 12 figures, accepted for publication in PRD

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Cited by in corpus (6)

• High-energy neutrinos in the context of multimessenger physics
• On the Implications of Late Internal Dissipation for Shallow-Decay Afterglow Emission and Associated High-Energy Gamma-Ray Signals
• Prompt TeV neutrinos from dissipative photospheres of gamma-ray bursts
• Gravitational lensing of transient neutrino sources by black holes
• High Energy Neutrino Emission from the Earliest Gamma-Ray Bursts
• Neutrino emission from a GRB afterglow shock during an inner supernova shock breakout