Self-consistent Modeling of Gamma-ray Spectra from Solar Flares with the Monte Carlo Simulation Package FLUKA

Autor(es)

Tusnski, Daneele S. ^[1] ; Szpigel, Sergio ^[1] ; Gimenez de Castro, Carlos Guillermo ^{[1, 2]} ; MacKinnon, Alexander L. ^[3] ; Simoes, Paulo Jose A. ^{[3, 1]}

Afiliação do(s) autor(es)

^[1] Univ Presbiteriana Mackenzie, Escola Engn, CRAAM, Sao Paulo - Brazil

^[2] Consejo Nacl Invest Cient & Tecn, Inst Astron & Fis Espacio, Buenos Aires, DF - Argentina

^[3] Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark - Scotland

• Tipo de documento: Artigo Científico
• Fonte: SOLAR PHYSICS; v. 294, n. 8 AUG 12 2019.
• Citações Web of Science: 0

Resumo

We use the Monte Carlo particle physics code FLUKA (Fluktuierende Kaskade) to calculate gamma-ray spectra expected from solar flare energetic ion distributions. The FLUKA code includes robust physics-based models for electromagnetic, hadronic and nuclear interactions, sufficiently detailed for it to be a useful tool for calculating nuclear de-excitation, positron-annihilation and neutron-capture line fluxes and shapes, as well as approximate to GeV continuum radiation from pion decay products. We show nuclear de-excitation gamma-ray line model spectra from a range of assumed primary accelerated ion distributions and find them to be in good agreement with those found using the code of Murphy et al. (2009). We also show full gamma-ray model spectra which exhibit all the typical structures of gamma-ray spectra observed in solar flares. From these model spectra we build templates which are incorporated into the software package Objective Spectral Executive (OSPEX) and used to fit the combined Fermi Gamma-ray Burst Monitor (GBM)/Large Area Telescope (LAT)spectrum of the 2010 June 12 solar flare, providing a statistically acceptable result. To the best of our knowledge, the fit carried out with the FLUKA templates for the full gamma-ray spectrum can be regarded as the first attempt to use a single code to implement a self-consistent treatment of the several spectral components in the photon energy range from approximate to 100s keV to approximate to 100s MeV. (AU)

• Processo FAPESP: 09/18386-7 - Modelagem integrada de emissões em rádio e raios-X durante explosões solares
• Beneficiário: Carlos Guillermo Giménez de Castro
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/13282-5 - Modelagem de processos nucleares em explosões solares utilizando pacotes de simulação Monte Carlo
• Beneficiário: Sérgio Szpigel
• Modalidade de apoio: Auxílio à Pesquisa - Regular