TeV gamma rays from the galactic center direct and indirect links to the massive black hole in Sgr A* View Full Text


Ontology type: schema:Chapter      Open Access: True


Chapter Info

DATE

2005

AUTHORS

Felix Aharonian , Andrii Neronov

ABSTRACT

The recent detection of TeV gamma-radiation from the direction of the Galactic Center within several arc-minutes around Sgr A* is the first model-independent evidence of existence of high-energy particle accelerator(s) in the central 10 pc region of our Galaxy. This is an extraordinary site that harbours many remarkable objects with the compact radio source Sgr A* — a hypothetical super-massive black hole (SMBH) — in the dynamical center of the Galaxy. Here we explore the possible direct and indirect links of the reported TeV emission to the SMBH. We show that at least three γ-ray production scenarios that take place close to the event horizon of theSMBHcan explain the reported TeV fluxes. An alternative (or additional) channel of TeV radiation is related to the run-away protons accelerated in Sgr A*. Quasi-continuous injection of relativistic protons into the surrounding dense gas environment initiates detectable high-energy gamma-ray emission. The absolute flux and the energy spectrum of this radiation component strongly depend on the history of particle injection and the character of diffusion of protons during the last 105 yr. For a reasonable combination of a few model parameters, one can explain the detected gamma-ray flux solely by this diffuse component. More... »

PAGES

255-265

Book

TITLE

Astrophysics and Space Science

ISBN

978-1-4020-4084-9

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/1-4020-4085-7_29

DOI

http://dx.doi.org/10.1007/1-4020-4085-7_29

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1022229686


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