Statistical properties of the highest pulses in gamma-ray bursts
文献类型：期刊论文
| 作者 | Tan YP(覃一平)1 ; Liang EW(梁恩维)1,2; Xie GZ(谢光中)1; Su CY(苏成悦)1,3
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| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2003-02 |
| 卷号 | 3期号:1页码:38-48 |
| 关键词 | gamma rays : bursts methods : data analysis |
| ISSN号 | 1009-9271 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Qin, YP (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | We study the statistical properties of the highest pulses within individual gamma-ray bursts (GRBs). A wavelet package analysis technique and a developed pulse-finding algorithm have been applied to identify the highest pulses from burst profiles observed by BATSE on board CGRO from 1991 April 21 to 1999 January 26. The statistical light curves of the highest pulses in four energy channels have been derived by an aligning method, which illustrate the temporal evolution of the pulse emission. Our result that narrower pulses go with higher energies is consistent with previous findings. By normalizing both the pulse durations and counts to unity, "characteristic" profiles of the highest pulses in the four channels are also derived. The four characteristic profiles are turned out to be almost the same, thus strongly support the previous conclusion that the temporal profiles in different energy channels are self-similar and the previous conjecture on GRB pulses, implying that the emission process is similar at different energies. The cosmological time dilation effect is examined by investigating the relationship between the pulse flux and pulse duration. An anti-correlation between the two was found, which agrees with the expectation of the cosmological time dilation effect. Also, the evolution of the pulse duration with the observational epoch is studied. The result shows that the pulse duration tends to be shorter in later epochs. This trend cannot be explained by the present theoretical models, and may represent a great challenge to current theories. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 分类号 | P17 |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | COSMOLOGICAL TIME DILATION ; ENERGY INJECTION ; AFTERGLOWS ; EVOLUTION ; DURATION ; LONG ; DISTRIBUTIONS ; PROGENITORS ; FIREBALLS ; REMNANTS |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/1009-9271/3/1/38/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000181239600004 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/6963]  |
| 专题 | 云南天文台_星系研究组 |
| 作者单位 | 1.National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 2.Department of Physics, Guangxi University, Nanning 530004, China 3.Department of Physics, Guangdong Industry University, Guangzhou 510643, China |
| 推荐引用方式 GB/T 7714 | Tan YP,Liang EW,Xie GZ,et al. Statistical properties of the highest pulses in gamma-ray bursts[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2003,3(1):38-48. |
| APA | Tan YP,Liang EW,Xie GZ,&Su CY.(2003).Statistical properties of the highest pulses in gamma-ray bursts.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,3(1),38-48. |
| MLA | Tan YP,et al."Statistical properties of the highest pulses in gamma-ray bursts".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 3.1(2003):38-48. |
入库方式： OAI收割
来源：云南天文台
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