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.

引用

页数：4

共 55 条

[41] Unstable relics as a source of galactic positrons [J].