The e+–e− Annihilation Line and the Cosmic X-Ray Background
نویسندگان
چکیده
منابع مشابه
Bridging the cosmic infrared background to the X-ray background
We estimate the contribution of AGNs and of their host galaxies to the infrared background. We use the luminosity function and evolution of AGNs recently determined by the hard X-ray surveys, and new Spectral Energy Distributions bridging the X-ray and the infrared emission, divided in intervals of absorption. These two ingredients allow us to determine the contribution of AGNs to the infrared ...
متن کاملConnecting the cosmic infrared background to the X-ray background
We estimate the contribution of AGNs and of their host galaxies to the infrared background. We use the luminosity function and evolution of AGNs recently determined by the hard X-ray surveys, and new Spectral Energy Distributions connecting the X-ray and the infrared emission, divided in intervals of absorption. These two ingredients allow us to determine the contribution of AGNs to the infrare...
متن کاملCosmic Gamma-Ray Background Anisotropies and Dark Matter Annihilation
The extragalactic cosmic gamma-ray background (CGB) is expected to provide indirect signatures of the presence of Dark Matter (DM) through gamma-rays produced in DM annihilations. In particular, DM can leave its imprint not only in the CGB energy spectrum but also in the peculiar pattern and intensity of the CGB anisotropies. These are expected to differ significantly with respect to the case o...
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High-energy photons from pair annihilation of dark matter particles contribute to the cosmic gamma-ray background (CGB) observed in a wide energy range. The precise shape of the energy spectrum of CGB depends on the nature of dark matter particles. In order to discriminate between the signals from dark matter annihilation and other astrophysical sources, however, the information from the energy...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1983
ISSN: 0074-1809
DOI: 10.1017/s0074180900038511