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- W3099692914 abstract "The bulge of our Galaxy is illuminated by the 0.511 MeV gamma-ray line flux from annihilations of nonrelativistic positrons. The emission is strongly concentrated at the Galactic Center (GC), in contrast to gamma-ray maps tracing nucleosynthesis (e.g., the 1.809 MeV line from decaying 26 Al) or cosmic ray processes (e.g., the 1–30 MeV continuum), which reveal a bright disk with a much less prominent central region. If positrons are generated at relativistic energies, higher-energy gamma rays will also be produced from inflight annihilation of positrons on ambient electrons. The comparison of the gamma-ray spectrum from inflight annihilation to the observed diffuse Galactic gamma-ray data constrains the injection energies of Galactic positrons to be less than 3 MeV." @default.
- W3099692914 created "2020-11-23" @default.
- W3099692914 creator A5011619231 @default.
- W3099692914 date "2007-11-01" @default.
- W3099692914 modified "2023-09-26" @default.
- W3099692914 title "Positron Annihilations at the Galactic Center: Generating More Questions Than Answers" @default.
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- W3099692914 doi "https://doi.org/10.1016/j.nuclphysbps.2007.08.031" @default.
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