Mature gamma-ray pulsars as possible sources of Galactic positrons

被引：1

作者：

Dai, Ben-Zhong ^{[1
]}

Yang, Chu-Yuan ^{[1
]}

Xiang, Yang ^{[1
]}

Wu, Yun-Fei ^{[1
]}

Jiang, Ze-Jun ^{[1
]}

Zhang, Li ^{[1
]}

机构：

[1] Yunnan Univ, Dept Phys, Kunming 650091, Peoples R China

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2008年 / 175卷

关键词：

D O I：

10.1016/j.nuclphysbps.2007.11.061

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We consider a possible contribution of mature gamma-ray pulsars to cosmic ray positrons based on the revised outer gap model, e(+/-) pairs in the pulsars magnetosphere are produced by the cascade of e(+/-) pairs through synchrotron radiation of the return current from the outer gap. Using a Monte Carlo method, we generate a sample of mature garnma-ray pulsars and estimate the spatial distribution. Using the diffuse model of cosmic rays propagation, we calculated the positron fraction, the result indicates that the pulsar contribution to the cosmic ray positrons peaks at about 10 GeV and the observed e(+)/(e(-) + e(+)) ratio can be explain in this model.

引用

页码：517 / 520

页数：4

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