Work

Galactic Center as an efficient source of cosmic rays

Year: 2020

Type: article

Abstract: After the discovery of Fermi bubbles and the excess of gamma-ray emission, the Galactic Center has received increasing attention with the aim to understand its role in the origin and acceleration of primary cosmic rays. Based on a diffusion/reacceleration model, we use the galprop software to solve the diffusion equation for the cosmic rays and compare the results with the cosmic-ray spectrum, motivated by the relationship between several energetic sources at the Galactic Center and the generated diffuse GeV-TeV gamma rays. We calculate the cosmic ray distribution, gamma-ray flux from the Galactic Center and explore its contribution on the spectrum and chemical composition of cosmic rays observed on Earth. We also discuss the effects of nuclei interactions with different interstellar gas models.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.101.123015

Authors: Rita. C. Anjos, Fernando Catalani

Institutions: Harvard University, Universidade Federal do Paraná, Universidade de São Paulo

Language: English

Topic: Astrophysics and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Fundação de Amparo à Pesquisa do Estado de São Paulo, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Instituto Serrapilheira

Awards: G3828120467, G4098499119, G6421643996, G6744963664, G8530449079