A test on different types of the time curve of hardness ratio of gamma-ray bursts based on the curvature effect
文献类型：期刊论文
| 作者 | Jia LW(贾兰伟)1,2
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| 刊名 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2008-08 |
| 卷号 | 8期号:4页码:451-464 |
| 关键词 | gamma-rays : bursts gamma-rays : observations methods : statistical |
| ISSN号 | 1009-9271 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Jia, LW (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | We analyzed a sample of 66 gamma-ray bursts (GRBs) and statistically confirmed the prediction on the time curve of the hardness ratio of GRBs made by Qin et al. based on the curvature effect. In their analysis, GRB pulses are divided into three types according to the shape of their raw hardness ratio (RHR) time curves, defined as to include the background counts to the signal counts, so as to make use of counts within small time intervals. Of the three types, very hard sources exhibit a perfect pulse-like profile (type I), hard bursts possess a pulse-like profile with a dip in the decay phase (type 2), and soft bursts show no pulse-like profile but have only a dipped profile (type 3). In terms of the conventional hardness ratio, type 3 sources are indeed generally softer than those of type I and type 2, in agreement with the prediction. We found that the minimum value of RHR is sensitive in distinguishing the different types. We propose that GRB pulses can be classified according to the minimum value of RHR and that the different type sources may be connected with different strengths of the shock or/and the magnetic field. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SPECTRAL EVOLUTION ; LIGHT CURVES ; PULSES ; FIREBALLS ; EMISSION ; AFTERGLOWS ; FEATURES ; PLASMA |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/1009-9271/8/4/09/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000258698200009 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/7036]  |
| 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, China 2.Graduate School of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Jia LW. A test on different types of the time curve of hardness ratio of gamma-ray bursts based on the curvature effect[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(4):451-464. |
| APA | Jia LW.(2008).A test on different types of the time curve of hardness ratio of gamma-ray bursts based on the curvature effect.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,8(4),451-464. |
| MLA | Jia LW."A test on different types of the time curve of hardness ratio of gamma-ray bursts based on the curvature effect".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 8.4(2008):451-464. |
入库方式： OAI收割
来源：云南天文台
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