Transejecta high-energy neutrino emission from binary neutron star mergers

Shigeo S. Kimura, Kohta Murase, Imre Bartos, Kunihito Ioka, Ik Siong Heng, Peter Mészáros

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


The observations of a macronova/kilonova accompanied by gravitational waves from a binary neutron star merger (GW170817) confirmed that neutron star coalescences produce copious ejecta. The coincident gamma-ray detection implies the existence of a relativistic jet in this system. During the jet's propagation within the ejecta, high-energy photons and neutrinos can be produced. The photons are absorbed by the ejecta, while the neutrinos escape and can be detected. Here, we estimate such transejecta neutrino emission, and discuss how neutrino observations could be used to differentiate between gamma-ray burst emission scenarios. We find that neutrinos from the internal shocks inside the ejecta may be detectable by IceCube within a few years of operation, and will likely be detected with IceCube-Gen2. The neutrino signals coincident with gravitational waves would enable us to reveal the physical quantities of the choked jets even without electromagnetic signals.

Original languageEnglish
Article number043020
JournalPhysical Review D
Issue number4
Publication statusPublished - 2018 Aug 15


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