Stringent constraint on galactic positron production

被引：169
作者：
Beacom, John F. [1 ]
Yuksel, Hasan
机构：
[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[2] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 07期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.97.071102
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The intense 0.511 MeV gamma-ray line emission from the Galactic Center observed by INTEGRAL requires a large annihilation rate of nonrelativistic positrons. If these positrons are injected at even mildly relativistic energies, higher-energy gamma rays will also be produced. We calculate the gamma-ray spectrum due to inflight annihilation and compare it with the observed diffuse Galactic gamma-ray data. Even with a simplified but conservative treatment, we find that the positron injection energies must be less than or similar to 3 MeV, which strongly constrains models for Galactic positron production.
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页数：4
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