De-excitation C and O lines and the 511 keV annihilation line from Sgr A - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Conference Papers Year : 2008

De-excitation C and O lines and the 511 keV annihilation line from Sgr A

V. A. Dogiel
  • Function : Author
K.-S. Cheng
  • Function : Author
D. O. Chernyshov
  • Function : Author
V. Tatischeff
  • Function : Author
C. M. Ko
  • Function : Author
W. H. Ip
  • Function : Author

Abstract

We present a model of the observed annihilation emission from the Galactic center. From our estimations it follows that this region should emit also a flux of de-excitation C and 0 lines at the level <= 10(-5) ph cm(-2) s(-1). From restrictions based on the observed >100 MeV gamma-ray flux from the Galactic center, similar to 2 x 10(-s) ph cm(-2) s(-1), we predict that the calculated gamma-ray line flux below 8 MeV is about 2.5 x 10(-5) ph cm(-2) s(-1). A specific line is the one at 1.809 MeV from radioactivity of Al-26 The predicted quasi-stationary flux of the Al-26 1.809 MeV line from the 1 degrees x 1 degrees central region is <= 10(-6) ph cm(-2) s(-1). (C) 2008 Elsevier B.V. All rights reserved.

Dates and versions

in2p3-00855575 , version 1 (29-08-2013)

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V. A. Dogiel, K.-S. Cheng, D. O. Chernyshov, V. Tatischeff, C. M. Ko, et al.. De-excitation C and O lines and the 511 keV annihilation line from Sgr A. 6th International Conference on Astronomy with Radioactivities, Jan 2008, Kreuth, Germany. pp.460-462, ⟨10.1016/J.NEWAR.2008.06.025⟩. ⟨in2p3-00855575⟩
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