The intensity and spectrum of galactic center beta (+) annihilation protons after Compton scattering

Details The intensity and spectrum of galactic center beta (+) annihilation protons after Compton scattering The intensity and spectrum of galactic center beta (+) annihilation protons after Compton scattering

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aipc...83..160f&link_type=abstract

IN: The galactic center; Proceedings of the Workshop, Pasadena, CA, January 7, 8, 1982 (A83-40676 19-90). New York, American Ins

Astronomy and Astrophysics

Astronomy

10

Astronomical Spectroscopy, Compton Effect, Galactic Nuclei, Gamma Ray Astronomy, Milky Way Galaxy, Positron Annihilation, Line Spectra, Scattering Cross Sections

Scientific paper

The physics of Compton scattering is examined as a candidate process to explain the gamma ray spectrum displaying two characteristics near 511 keV in radio surveys of the galactic center. Consideration is given to a point source located with a finite and spherically symmetric scattering medium producing a shift in the wavelength and conserving the photon number. The scattered photon intensity is calculated in the 300-511 keV range relative to the narrow line intensity and compared with observational data. It is shown that the observed 6 month intensity decrease in the 511 keV line from the galactic center can be attributed to alteration in the scattering depth, indicating a continuous condensation of scattering material. An alternative explanation could be higher density scattering absorbing regions in orbit aroung a central positron-producing region, i.e., the core of a protostar.

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