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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Secondary neutrino and gamma-ray fluxes from SimProp and CRPropa

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Autor(es):
Batista, Rafael Alves [1] ; Boncioli, Denise [2, 3, 4] ; di Matteo, Armando [5] ; van Vliet, Arjen [6, 2]
Número total de Autores: 4
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Journal of Cosmology and Astroparticle Physics; n. 5 MAY 2019.
Citações Web of Science: 3
Resumo

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)

Processo FAPESP: 17/12828-4 - Difusão, aceleração e propagação de raios cósmicos em ambientes astrofísicos turbulentos
Beneficiário:Rafael Alves Batista
Linha de fomento: Bolsas no Brasil - Pós-Doutorado