Possible contribution of mature gamma-ray pulsars to cosmic-ray positrons

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	Possible contribution of mature gamma-ray pulsars to cosmic-ray positrons
	Gao QG(高全归)1 ; Jiang, ZJ2 ; Zhang L(张力)1,2
刊名	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2008
卷号	8 期号:1 页码:87-95
关键词	stars : pulsars : general acceleration of particles ISM : cosmic rays
ISSN号	1009-9271
通讯作者	Gao, QG (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	We restudy the possible contribution of mature gamma-ray pulsars to cosmic ray positrons based on the new version of outer gap model. In this model, the inclination angle and average properties of the outer gap are taken into account, and more mature pulsars can have the outer gap and emit high energy photons. Half of the primary particles in the outer gaps will flow back toward the star surface and emit synchrotron photons, which can produce electron/positron pairs by the cascade of pair production. Some of these pairs will escape from the light cylinder and be accelerated to relativistic energies in the pulsar wind driven by low-frequency electromagnetic waves. Using a Monte Carlo method, we obtain a sample of mature gamma-ray pulsars and then calculate the production of the positrons from these pulsars. The observed excess of cosmic positrons can be well explained by this model.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	RAPIDLY SPINNING PULSARS ; ROTATION-POWERED PULSARS ; HIGH-ENERGY RADIATION ; OUTER GAPS ; EVOLUTION ; EMISSION ; RADIO ; POPULATIONS ; STATISTICS ; LUMINOSITY
收录类别	SCI
原文出处	http://iopscience.iop.org/1009-9271/8/1/09/
语种	英语
WOS记录号	WOS:000253671300009
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4229]
专题	云南天文台_其他
作者单位	1.National Astronomical Observatories / Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011 2.Department of Physics, Yunnan University, Kunming 650091
推荐引用方式 GB/T 7714	Gao QG,Jiang, ZJ,Zhang L. Possible contribution of mature gamma-ray pulsars to cosmic-ray positrons[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(1):87-95.
APA	Gao QG,Jiang, ZJ,&Zhang L.(2008).Possible contribution of mature gamma-ray pulsars to cosmic-ray positrons.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,8(1),87-95.
MLA	Gao QG,et al."Possible contribution of mature gamma-ray pulsars to cosmic-ray positrons".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 8.1(2008):87-95.