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Study on the spectrum of the injected relativistic protons

Published online by Cambridge University Press:  01 April 2008

Y. P. Wang ,
Y. Lu  and
L. Chen
Y. P. Wang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected] Department of Astronomy, Beijing Normal University, Beijing 100875, China
Y. Lu
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected]
L. Chen
Affiliation:
Department of Astronomy, Beijing Normal University, Beijing 100875, China
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Abstract

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About 10 TeV γ-ray emission within 10 pc region from the Galactic Center had been reported by 4 independent groups. Considering that this TeV γ-ray emission is produced via a hadronic model, and the relativistic protons came from the tidal disruption of stars by massive black holes, we investigate the spectral nature of the injected relativistic protons required by the hadronic model. The calculation was carried on the tidal disruption of the different types of stars and the different propagation mechanisms of protons in the interstellar medium. Compared with the observation data from HESS, we find for the best fitting that the power-law index of the spectrum of the injected protons is about −1.9, when a red giant star is tidally disrupted, and the effective confinement of protons diffusion mechanism is adopted.

Keywords

black hole physics- galaxies: jets -Galaxy: center
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S252: The Art of Modeling Stars in the 21st Century , April 2008 , pp. 345 - 346
Copyright
Copyright © International Astronomical Union 2008

References

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