High-energy neutrinos from fallback accretion of binary neutron star merger remnants
| Autor: | Claire Guépin, Valentin Decoene, Kumiko Kotera, Ke Fang, Brian D. Metzger |
|---|---|
| Přispěvatelé: | Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
photon hadron
neutron star: binary neutrino: energy: high Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Cosmic ray Astrophysics Kilonova 7. Clean energy 01 natural sciences UHE neutrino: flux IceCube accretion Observatory 0103 physical sciences propagation cosmic radiation: acceleration Ejecta 010303 astronomy & astrophysics High Energy Astrophysical Phenomena (astro-ph.HE) Physics 010308 nuclear & particles physics Gravitational wave gravitational radiation Astronomy and Astrophysics Accretion (astrophysics) observatory Neutron star wide-angle 13. Climate action flow correlation neutron star: binary: coalescence Neutrino Astrophysics - High Energy Astrophysical Phenomena [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
| Zdroj: | JCAP JCAP, 2020, 04, pp.045. ⟨10.1088/1475-7516/2020/04/045⟩ |
| DOI: | 10.1088/1475-7516/2020/04/045⟩ |
| Popis: | Following the coalescence of binary neutron stars, debris from the merger which remains marginally bound to the central compact remnant will fallback at late times, feeding a sustained accretion flow. Unbound winds or a wide-angle jet from this radiatively-inefficient disk may collide with the comparatively slow dense kilonova ejecta released from an earlier phase. Under the assumption that such interaction accelerate cosmic rays to ultra-high energies, we numerically simulate their propagation and interactions through the dynamical ejecta. The hadronuclear and photo-hadronic processes experienced by particles produce isotropic high-energy neutrino fluxes, peaking at times $10^{3-4}\,$s, which we calculate for two sets of parameters. A first set is inspired by the observations of GW170817. In the second scenario, which we call optimistic, parameters are chosen so as to optimize the neutrino flux, within the range allowed by observation and theory. We find that single sources can only be detected with IceCube-Gen2 for optimistic scenarios and if located within $\sim 4\,$Mpc. The cumulative flux could contribute to $\sim 0.5-10\%$ of the diffuse flux observed by the IceCube Observatory, depending on the fall-back power and the cosmic ray composition. The neutrino emission powered by fallback is nearly isotropic, and can be used for future correlation studies with gravitational wave signals. 29 pages, 8 figures |
| Databáze: | OpenAIRE |
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