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POSITRON-ANNIHILATION RADIATION FROM X-RAY BINARY-SYSTEMS
Wu M(吴枚); Zhang CS(张春生); Li TB(李惕碚); WU, M; ZHANG, CS; LI, TP
1993
发表期刊ASTROPHYSICAL JOURNAL
卷号404期号:1页码:#REF!
通讯作者WU, M (reprint author), CHINESE ACAD SCI,INST HIGH ENERGY PHYS,HIGH ENERGY ASTROPHYS LAB,POB 9183,BEIJING,PEOPLES R CHINA.
摘要Positron annihilation radiation from the direction of the Galactic center (GC) has been observed for over two decades. A detailed analysis of the observations has shown that the GC annihilation source consists of both a ''steady state'' diffuse component plus one or more highly variable point sources (see, e.g., Lingenfelter & Ramaty 1989 and references therein). As to the annihilation radiation directly from binary systems, discussions are few to date. In this paper we make a detailed investigation of the electron-positron annihilation process around X-ray binary systems, typically the Cygnus X-3 system, by a Monte Carlo calculation. Our results show that there exists a narrow 511 keV annihilation line emitted from some kind of X-ray binary systems, for example, from an accreting neutron star X-ray source which contains an optically thick accretion disk corona. The significance and width of radiation lines depend on the corona electron density and the size, status, and temperature distribution of the X-ray halo around the binary system. For a typical accreting neutron star X-ray binary source, the annihilation radiation is detectable by the CGRO/OSSE detector. Since some researchers believe that the point source candidates of the GC annihilation radiation may be 1E 1740.7-2942 and GX 1+4 and/or others, which would be X-ray binaries, this work may give a hint for understanding the emission mechanism of the GC annihilation radiation.
文章类型Article
关键词GAMMA-RAYS, THEORY RADIATION MECHANISMS, MISCELLANEOUS STARS, INDIVIDUAL (CYGNUS-X-3) X-RAYS, STARS
学科领域Astronomy & Astrophysics
DOI10.1086/172277
收录类别SCI
WOS类目Astronomy & Astrophysics
WOS记录号WOS:A1993KK91200025
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/227345
专题院士
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GB/T 7714
Wu M,Zhang CS,Li TB,et al. POSITRON-ANNIHILATION RADIATION FROM X-RAY BINARY-SYSTEMS[J]. ASTROPHYSICAL JOURNAL,1993,404(1):#REF!.
APA 吴枚,张春生,李惕碚,WU, M,ZHANG, CS,&LI, TP.(1993).POSITRON-ANNIHILATION RADIATION FROM X-RAY BINARY-SYSTEMS.ASTROPHYSICAL JOURNAL,404(1),#REF!.
MLA 吴枚,et al."POSITRON-ANNIHILATION RADIATION FROM X-RAY BINARY-SYSTEMS".ASTROPHYSICAL JOURNAL 404.1(1993):#REF!.
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