Variable positron annihilation radiation from the galactic center region
نویسندگان
چکیده
منابع مشابه
Annihilation Fountain in the Galactic Center Region
Two different model-independent mapping techniques have been applied to CGRO OSSE, SMM, TGRS and balloon data and reveal a feature in the 0.511 MeV e +-e − annihilation radiation pattern of our galaxy centered at ℓ ∼ −2 • and b ∼ 10 • with a flux of ∼ 5 · 10 −4 0.511 MeV ph cm −2 s −1. If near the galactic center, then e + sources are producing ∼ 10 42 e + s −1 which annihilate ≈ 1-2 kpc above ...
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The electron-positron annihilation spectrum observed by SPI/INTEGRAL during deep Galactic Center region exposure is reported. The line energy (510.954±0.075 keV) is consistent with the unshifted annihilation line. The width of the annihilation line is 2.37±0.25 keV (FWHM), while the strength of the ortho-positronium continuum suggests that the dominant fraction of positrons (94±6%) form positro...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1981
ISSN: 0004-637X,1538-4357
DOI: 10.1086/183613