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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Secondary neutrino and gamma-ray fluxes from SimProp and CRPropa

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Author(s):
Batista, Rafael Alves [1] ; Boncioli, Denise [2, 3, 4] ; di Matteo, Armando [5] ; van Vliet, Arjen [6, 2]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, BR-05508090 Sao Paulo, SP - Brazil
[2] DESY, Platanenallee 6, D-15738 Zeuthen - Germany
[3] GSSI, Viale Francesco Crispi 7, I-67100 Laquila - Italy
[4] Ist Nazl Fis Nucl, LNGS, I-67100 Laquila - Italy
[5] ULB, Serv Phys Theor, CP255, Blvd Triomphe, Campus Plaine, B-1050 Brussels - Belgium
[6] Radboud Univ Nijmegen, Dept Astrophys, IMAPP, POB 9010, NL-6500 GL Nijmegen - Netherlands
Total Affiliations: 6
Document type: Journal article
Source: Journal of Cosmology and Astroparticle Physics; n. 5 MAY 2019.
Web of Science Citations: 3
Abstract

The interactions of ultra-high energy cosmic rays (UHECRs) with background photons in extragalactic space generate high-energy neutrinos and photons. Simulating UHECR propagation requires assumptions about physical quantities such as the spectrum of the extragalactic background light (EBL) and photodisintegration cross sections. These assumptions, as well as the approximations used in the codes, may influence the computed predictions both of cosmic-ray spectra and composition, and of cosmogenic neutrino and photon fluxes. Following up on our previous work where we studied the resulting uncertainties on cosmic-ray simulations, here we quantify those on neutrinos and photons, using the Monte Carlo codes CRPropa and SimProp in various source scenarios. We discuss the results in the light of the constraining power of the neutrino and photon spectra on the origin of the UHECRs. We show that cosmogenic neutrino fluxes are more sensitive to the parametrization of the EBL than UHECR spectra, whereas the overall cosmogenic gamma-ray production rates are relatively independent on details of the propagation. We also find large differences between neutrino fluxes predicted by the latest released versions of CRPropa and SimProp, and discuss their causes and possible improvements in future versions of the codes. (AU)

FAPESP's process: 17/12828-4 - Diffusion, acceleration and propagation of cosmic rays in turbulent astrophysical environments
Grantee:Rafael Alves Batista
Support type: Scholarships in Brazil - Post-Doctorate