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

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

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008newar..52..460d&link_type=abstract

New Astronomy Reviews, Volume 52, Issue 7-10, p. 460-462.

Astronomy and Astrophysics

Astronomy

3

95.30.Gv

Scientific paper

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 O 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, ˜2 × 10-5 ph cm-2 s-1, we predict that the calculated gamma-ray line flux below 8 MeV is about 2.5×10 ph cm- s-. A specific line is the one at 1.809 MeV from radioactivity of 26Al. The predicted quasi-stationary flux of the 26Al 1.809 MeV line from the 1°×1° central region is ⩽10 ph cm- s-.

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