Can I read Diffuse gamma-ray emission from the Galactic center and implications of its past activities on EtoBox?

Diffuse gamma-ray emission from the Galactic center and implications of its past activities by Fujita, Yutaka; Kimura, Shigeo S.; Murase, Kohta is a scholarly article available to read on EtoBox.

What is Diffuse gamma-ray emission from the Galactic center and implications of its past activities about?

It has been indicated that low-luminosity active galactic nuclei (LLAGNs) are accelerating high-energy cosmic-ray (CR) protons in their radiatively inefficient accretion flows (RIAFs). If this is the case, Sagittarius A* (Sgr A*) should also be generating CR protons, because Sgr A* is a LLAGN. Based on this scenario, we calculate a production rate of CR protons in Sgr A* and their diffusion in the central molecular zone (CMZ) around Sgr A*. The CR protons diffusing in the CMZ create gamma-rays through pp interaction. We show that the gamma-ray luminosity and spectrum are consistent with observations if Sgr A* was active in the past.

Author

Fujita, Yutaka; Kimura, Shigeo S.; Murase, Kohta

Published

2016

Language

EN