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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.)

Cosmogenic photon and neutrino fluxes in the Auger era

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Autor(es):
Batista, Rafael Alves [1] ; de Almeida, Rogerio M. [2] ; Lago, Bruno [3] ; Kotera, Kumiko [4, 5, 6]
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] Univ Fed Fluminense, EEIMVR, Volta Redonda, RJ - Brazil
[3] CEFET RJ, Ctr Fed Educ Tecnol Celso Suckow Fonseca, Campus Nova Friburgo, Nova Friburgo, RJ - Brazil
[4] UPMC Univ Paris 6, Sorbonne Univ, 98 Bis Bd Arago, F-75014 Paris - France
[5] CNRS, UMR 7095, Inst Astrophys Paris, 98 Bis Bd Arago, F-75014 Paris - France
[6] Univ Paris Diderot, CNRS, IRFU, Lab AIM Paris Saclay, CEA, DSM, F-91191 Gif Sur Yvette - France
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Journal of Cosmology and Astroparticle Physics; n. 1 JAN 2019.
Citações Web of Science: 15
Resumo

The interaction of ultra-high-energy cosmic rays (UHECRs) with pervasive photon fields generates associated cosmogenic fluxes of neutrinos and photons due to photohadronic and photonuclear processes taking place in the intergalactic medium. We perform a fit of the UHECR spectrum and composition measured by the Pierre Auger Observatory for four source emissivity scenarios: power-law redshift dependence with one free parameter, active galactic nuclei, gamma-ray bursts, and star formation history. We show that negative source emissivity evolution is favoured if we treat the source evolution as a free parameter. In all cases, the best fit is obtained for relatively hard spectral indices and low maximal rigidities, for compositions at injection dominated by intermediate nuclei (nitrogen and silicon groups). In light of these results, we calculate the associated fluxes of neutrinos and photons. Finally, we discuss the prospects for the future generation of high-energy neutrino and gamma-ray observatories to constrain the sources of UHECRs. (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