Galactic Center as an efficient source of cosmic rays

Author(s)

Anjos, Rita C. ^{[1, 2]} ; Catalani, Fernando ^{[3, 4]}

Affiliation

^[1] Harvard Univ, Dept Astron, 60 Garden St, Cambridge, MA 02138 - USA

^[2] Univ Fed Parana UFPR, Dept Engn & Ciencias Exatas, Pioneiro 2153, BR-85950000 Palotina, PR - Brazil

^[3] Univ Sao Paulo, Escola Engn Lorena, Area 1 Estr Municipal Campinho S-N, BR-12602810 Lorena, SP, Brazil.Anjos, Rita C., Harvard Univ, Dept Astron, 60 Garden St, Cambridge, MA 02138 - USA

^[4] Univ Sao Paulo, Escola Engn Lorena, Area 1 Estr Municipal Campinho S-N, BR-12602810 Lorena, SP - Brazil

• Document type: Journal article
• Source: Physical Review D; v. 101, n. 12 JUN 12 2020.
• Web of Science Citations: 0

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. (AU)

• FAPESP's process: 15/15897-1 - Cherenkov Telescope Array - CTA
• Grantee: Luiz Vitor de Souza Filho
• Support Opportunities: Research Projects - Thematic Grants