Magnetic field effects and particle acceleration in gamma-ray bursts (GRBs): theory, numerical simulations, and observational prospects

• Processo: 11/51275-4
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Data de Início da vigência: 01 de dezembro de 2011
• Data de Término da vigência: 30 de novembro de 2014
• Área do conhecimento: Ciências Exatas e da Terra - Astronomia - Astrofísica Extragaláctica
• Acordo de Cooperação: Universidade Hebraica de Jerusalém
• Pesquisador responsável: Elisabete Maria de Gouveia Dal Pino
• Beneficiário: Elisabete Maria de Gouveia Dal Pino
• Pesquisador Responsável no exterior: Tsvi Piran
• Instituição Parceira no exterior: Hebrew University of Jerusalem, Israel
• Instituição Sede: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brasil
• Vinculado ao auxílio: 06/50654-3 - Investigação de fenômenos de altas energias e plasmas astrofísicos: teoria, observação e simulações numéricas, AP.TEM
• Assunto(s): Erupção de raios gama Jatos extragalácticos Aceleração de partículas Campo magnético Colisão de partículas Simulação numérica Observatório Cherenkov Telescope Array
• Palavra(s)-Chave do Pesquisador: Gamma Ray Bursts | Jets | Magnetic Field Effects | Magnetic Reconnection | Mhd Numerical Simulations | Particle Acceleration

Resumo

In the ongoing thematic project related to this proposal, several aspects of the theory of Astrophysical jets including production mechanisms and energetic particle acceleration have been investigated both analytically and numerically. Supersonic jets are ubiquitous in the Universe as they are associated to a wide variety of astrophysical objects - from young stars to gamma-ray-bursts (GRBs). In particular, GRBs are the most energetic and probably most mysterious phenomena in the cosmos and in this joint Proposal with Prof. T. Piran of HUJ, one of the most prominent experts in the world in GRBs theory, we aim to investigate several aspects of the physics of the ultra relativistic jets associated to GRBs. In this context, we plan to study: magnetic field reconnection, magnetic turbulence, MHD dynamics of jets, and particle acceleration by collisionless magnetized shocks and by magnetic reconnection within the relativistic regime. This project will maximize the synergy between the two groups. The research will involve both analytic techniques and numerical simulations. It will also involve analysis of astronomical satellite data concerning GRBs and the possibility to make theoretical predictions for the coming CTA (Cherenkov Telescope Array) gamma-ray observatory. (AU)

Publicações científicas

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

ROCHA DA SILVA, G.; FALCETA-GONCALVES, D.; KOWAL, G.; DE GOUVEIA DAL PINO, E. M.. Ambient magnetic field amplification in shock fronts of relativistic jets: an application to GRB afterglows. Monthly Notices of the Royal Astronomical Society, v. 446, n. 1, p. 104-119, JAN 2015. (13/18815-0, 09/54006-4, 11/12909-8, 13/04073-2, 06/50654-3, 11/51275-4, 09/50053-8)

SINGH, C. B.; DE GOUVEIA DAL PINO, E. M.; KADOWAKI, L. H. S.. ON THE ROLE OF FAST MAGNETIC RECONNECTION IN ACCRETING BLACK HOLE SOURCES. Astrophysical Journal Letters, v. 799, n. 2, FEB 1 2015. (13/09065-8, 11/51275-4)