PULSED GAMMA-RAYS FROM GEMINGA

被引:0
作者
CHENG, KS [1 ]
MA, YQ [1 ]
机构
[1] INST HIGH ENERGY PHYS,BEIJING 100039,PEOPLES R CHINA
关键词
D O I
10.1007/BF00627079
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The pulsed gamma ray spectrum is obtained by analyzing COS-B data of observation no. 14, 39, 54 and 64. We find that the pursed spectrum differs significantly from that of previous reports in which the pulsed component and steady component are not separated. A clear spectral break of the pulsed spectrum occurs at similar to 100 MeV and the majority of the steady emission is concentrated in the lower energy band. We fit the pulsed spectrum by both the outer gap model and the polar gap model and conclude that only the outer gap model can explain the observed spectrum. Furthermore, the gamma ray spectrum suggests that Geminga is located at a distance similar to 300 pc and is a nearly orthogonal rotator.
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页码:1 / 7
页数:7
相关论文
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