Theoretical Study of Gamma-ray Pulsars

被引：1
|
作者：
Song, Yuzhe [1 ]
Cheng, Kwong Sang [1 ]
Takata, Jumpei [2 ]
机构：
[1] Univ Hong Kong, Dept Phys, Pokfulam, Hong Kong, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China
来源：
JOURNAL OF ASTRONOMY AND SPACE SCIENCE | 2016年 / 33卷 / 02期
基金：
中国国家自然科学基金;
关键词：
pulsar; gamma-ray;
D O I：
10.5140/JASS.2016.33.2.69
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We use the non-stationary three dimensional two-layer outer gap model to explain gamma-ray emissions from a pulsar magnetosphere. We found out that for some pulsars like the Geminga pulsar, it was hard to explain emissions above a level of around 1 GeV. We then developed the model into a non-stationary model. In this model we assigned a power-law distribution to one or more of the spectral parameters proposed in the previous model and calculated the weighted phaseaveraged spectrum. Though this model is suitable for some pulsars, it still cannot explain the high energy emission of the Geminga pulsar. An Inverse-Compton Scattering component between the primary particles and the radio photons in the outer magnetosphere was introduced into the model, and this component produced a sufficient number of GeV photons in the spectrum of the Geminga pulsar.
引用
收藏
页码：69 / 73
页数：5
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