| Texto completo | |
| Autor(es): |
Lang, Rodrigo Guedes
;
Taylor, Andrew M.
;
de Souza, Vitor
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 103, n. 6, p. 12-pg., 2021-03-03. |
| Resumo | |
Recent data from the Pierre Auger Observatory has revealed the presence of a large-scale dipole in the arrival direction distribution of ultrahigh-energy cosmic rays (UHECR). In this work, we build up an understanding of the diffusive origin of such a dipolar behavior as well as its dependency on energy and astrophysical source assumptions such as extra-Galactic magnetic field strength and cosmic ray composition. We present a novel analytical approach for calculating the angular distribution of CR coming from a single source and discuss the regimes in which the steady-state dipole result is expected. We also present a semianalytical method for calculating the evolution with energy of the resultant dipole for an ensemble of sources. We show that a local source allows for a strong growth of the dipole with energy over a large energy range. The possibility of a transition from a dipolar to nondipolar regime at the highest energies and its implications for the source density, magnetic field intensity, and cosmic ray composition are discussed. (AU) | |
| Processo FAPESP: | 15/15897-1 - Cherenkov Telescope Array - CTA |
| Beneficiário: | Luiz Vitor de Souza Filho |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 16/24943-0 - Nova física fundamental em astropartículas: matéria escura e Invariância de Lorentz |
| Beneficiário: | Rodrigo Guedes Lang |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 19/01653-4 - Sobre a importância das fontes locais de raios cósmicos de altíssima energia |
| Beneficiário: | Rodrigo Guedes Lang |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |