paper

Differentiating short gamma-ray bursts progenitors through multi-MeV neutrinos

arXiv:1908.04747

Abstract

With the most recent multi-messenger detection, a new branch in modern astronomy has arisen. The GW170817 event together with the short gamma-ray burst GRB 170817A was the first-ever detection of the gravitational waves and an electromagnetic counterpart. These detections encourage us to think that in the following years we will detect a single event through three different channels: including the mentioned above plus neutrinos from multiple astrophysical sources, like those detected from SN1987A. It is believed that short GRBs are originated in the merger of a black-hole (BH) with a neutron star (NS) or NS-NS scenario. Particularly only in the latter case, several simulations suggest that the magnetic field can be amplified up to G. Considering this effect over created thermal neutrinos during the initial stage, we could differentiate short GRB progenitors through the neutrino expected flavor ratio and the opacity created by the baryon-loaded winds ejected in each scenario. Moreover, We find that it is more feasible to detect neutrinos from BH-NS than NS-NS systems. Finally, we also estimate the number of neutrino events expected on ground-based detectors, finding that it is possible to detect neutrinos from an energetic enough source located within a nearby vicinity with Hyper-Kamiokande detector.

arXiv comment14 pages, 6 figures

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