再探伽玛射线暴中能量与脉冲宽度的依赖关系
Revisite of the Energy Dependence on the Pulse Width in Gamma-Ray Bursts
查看参考文献21篇
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文摘
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探索来源于BATSE（http：／／cossc：gsfc：nasa：gov／batse）的GRB（Gamma—Ray Burst，伽玛射线暴）观测数据的半峰宽度（FWHM）与能量之间的关系，基于64个用KRL函数模型（即，文[1]中的（22）式）能很好地拟合的FRDE（Fast Rise and Exponential Decay，快速上升指数下降）型脉冲样本。发现64个样本中有63个的半峰宽度（FWHM）与能量之间的关系属于平台-幂率-平台型结构或峰型结构。64个样本的半峰宽度（FWHM）与能量之间的关系在观测中可详细分为5种类型：a）有34个样本为幂率形式关系；b）18个样本为低能段平台关系；c）有7个样本为高能段平台关系；d）4个样本为峰型结构关系；e）另外有1个样本为其他结构。结果表明：GRB观测数据的半峰宽度（FWHM）与能量之间的确存在有幂率的关系。此结果进一步确认了文[2]（Qinet al 2005）的观点，即半峰宽度（FWHM）与能量之间的关系是由于火球模型的多普勒效应（Doppler effect）导致的。 |
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其他语种文摘
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The relationship between the pulse FWHM （full-widths at half maximum） and the energy of gammaray bursts （GRBs） is explored based on the observed data from BATSE data base （http：//cossc： gsfc：nasa：gov/ atse/）. Based on a sample of 64 FRED （fast rise and exponential decay） pulse bursts better fitted with the KRL model （ refer equation （22） in [ 1 ] ）, it is found that 63, out of the 64 sources, belong to either the platform- power-law-platform feature class or the peaked feature group. The classifications for 64 sources could be sorted into five models in detail： a） a power law range could be observed in 34 sources; b） a lower band platform could be observed or suspected in 18 bursts; c） a higher band platform could be observed or suspected in 7 sources; d） a peaked feature could be observed or suspected in 4 GRBs; e） the other model from the four types above could be observed in 1 sources. The result suggests that there exists a power law relationship between the pulse FWHM of GRBs and the energy. And the result confirms the points from Qin et al （2005）[2]that the relationship is due to the Doppler effect of fireballs. |
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来源
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天文研究与技术
,2007,4(1):1-10 【核心库】
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关键词
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伽玛射线暴
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光变曲线
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观测数据统计
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地址
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1.
广西大学物理科学与工程技术学院, 广西, 南宁, 530004
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广西民族学院物理系, 广西, 南宁, 530012
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1672-7673 |
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学科
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天文学 |
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文献收藏号
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CSCD:2751914
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参考文献 共
21
共2页
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