Statistical Properties of the Highest Pulses in Gamma-Ray Bursts
文献类型：期刊论文
| 作者 | Qin Yiping; Liang Enwei; Xie Guangzhong; Su Chengyue |
| 刊名 | Chinese Journal of Astronomy and Astrophysics
 |
| 出版日期 | 2003 |
| 卷号 | 3期号:1页码:38 |
| ISSN号 | 1009-9271 |
| 英文摘要 | We study the statistical properties of the highest pulses within individualgamma-ray bursts (GRBs). A wavelet package analysis technique and a developedpulse-finding algorithm have been applied to identify the highest pulses from burstprofiles observed by BATSE on board CGRO from 1991 April 21 to 1999 January26. The statistical light curves of the highest pulses in four energy channels havebeen derived by an aligning method, which illustrate the temporal evolution of thepulse emission. Our result that narrower pulses go with higher energies is consistentwith previous findings. By normalizing both the pulse durations and counts tounity, "characteristic" profiles of the highest pulses in the four channels are alsoderived. The four characteristic profiles are turned out to be almost the same,thus strongly support the previous conclusion that the temporal profiles in differentenergy channels are self-similar and the previous conjecture on GRB pulses, implyingthat the emission process is similar at different energies. The cosmological timedilation effect is examined by investigating the relationship between the pulse fluxand pulse duration. An anti-correlation between the two was found, which agreeswith the expectation of the cosmological time dilation effect. Also, the evolutionof the pulse duration with the observational epoch is studied. The result showsthat the pulse duration tends to be shorter in later epochs. This trend cannot beexplained by the present theoretical models, and may represent a great challenge tocurrent theories. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/48297]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | Qin Yiping,Liang Enwei,Xie Guangzhong,et al. Statistical Properties of the Highest Pulses in Gamma-Ray Bursts[J]. Chinese Journal of Astronomy and Astrophysics,2003,3(1):38. |
| APA | Qin Yiping,Liang Enwei,Xie Guangzhong,&Su Chengyue.(2003).Statistical Properties of the Highest Pulses in Gamma-Ray Bursts.Chinese Journal of Astronomy and Astrophysics,3(1),38. |
| MLA | Qin Yiping,et al."Statistical Properties of the Highest Pulses in Gamma-Ray Bursts".Chinese Journal of Astronomy and Astrophysics 3.1(2003):38. |
入库方式： OAI收割
来源：国家天文台
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