The recent gamma-ray burst GRB 130427A has an isotropic electromagnetic energy E iso ∼ 1054 erg, suggesting an ample supply of target photons for photo-hadronic interactions, which at its low redshift of z ∼ 0.34 would appear to make it a promising candidate for neutrino detection. However, the IceCube collaboration has reported a null result based on a search during the prompt emission phase. We show that this neutrino non-detection can provide valuable information about this gamma-ray burst's (GRB's) key physical parameters such as the emission radius Rd , the bulk Lorentz factor Γ, and the energy fraction converted into cosmic rays εp. The results are discussed both in a model-independent way and in the specific scenarios of an internal shock (IS) model, a baryonic photospheric (BPH) model, and a magnetic photospheric (MPH) model. We find that the constraints are most stringent for the MPH model considered, but the constraints on the IS and the BPH models are fairly modest.
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science