| Testing the universal structured jet models of gamma-ray bursts with BATSE observations | |
Cui XH(崔晓红)1,2 ; Liang EW(梁恩维)1,3,4; Lu RJ(陆睿静)1,2,3; Liang, EW (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
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| 发表期刊 | ASTRONOMICAL JOURNAL
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| 2005-08 | |
| 卷号 | 130期号:2页码:418-424 |
| DOI | 10.1086/431155 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Gamma Rays : Bursts Gamma Rays : Observations Methods : Statistical |
| 摘要 | Assuming that the observed gamma-ray burst (GRB) rate as a function of redshift is proportional to the corrected star formation rate, we derive the empirical distribution of the viewing angles of long BATSE GRBs, P-em(theta), and the distribution of these bursts in the (theta, z)- plane, P-em(theta, z), by using a tight correlation between the collimation-orrected gamma-ray energy (E-gamma) and the peak energy of the vF(v) spectrum measured in the rest frame (E-p'). Our results show that P-em(theta) is well fitted by a lognormal distribution centered at log (theta/1 rad) = -0.76 with a width of sigma(log theta) = 0.57. We test different universal structured jet models by comparing model predictions, P-th(theta) and P-th(theta, z), with our empirical results. To make the comparisons reasonable, an "effective" threshold, which corresponds to the sample selection criteria of the long GRB sample, is used. We find that (1) P-th(theta) predicted by a power-law jet model is consistent with P-em(theta), but P-th(theta, z) predicted by this model is significantly different from P-em(theta, z); (2) P-th(theta, z) predicted by a single-Gaussian jet model is more consistent with P-em(theta, z) than that predicted by the power-law jet model, but P-th(theta) predicted by this model rapidly drops at theta > 0.3 rad and greatly deviates from P-em(theta); and ( 3) both the P-th(theta) and P-th(theta, z) predicted by a two- Gaussian jet model are roughly consistent with our empirical results. A brief discussion shows that cosmological effects on the E-gamma-E-p' relation do not significantly affect our results, but sample selection effects on this relationship might significantly influence our results. |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-6256 |
| URL | 查看原文 |
| 归档日期 | 2006-01-08 |
| WOS记录号 | WOS:000230721600006 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | STANDARD ENERGY RESERVOIR ; AFTERGLOW LIGHT CURVES ; PEAK ENERGY ; 2-COMPONENT JET ; VIEWING ANGLE ; SPECTRA ; PREDICTIONS ; BRIGHT ; SPECTROSCOPY ; SIMULATIONS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/6074 |
| 专题 | 太阳物理研究组 |
| 通讯作者 | Liang, EW (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| 作者单位 | 1.Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Kunming 650011, China 2.The Graduate School of the Chinese Academy of Sciences, Beijing, China 3.Physics Department, Guangxi University, Nanning 530004, China 4.Physics Department, University of Nevada, Las Vegas, NV 89154 |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Cui XH,Liang EW,Lu RJ,et al. Testing the universal structured jet models of gamma-ray bursts with BATSE observations[J]. ASTRONOMICAL JOURNAL,2005,130(2):418-424. |
| APA | Cui XH,Liang EW,Lu RJ,&Liang, EW .(2005).Testing the universal structured jet models of gamma-ray bursts with BATSE observations.ASTRONOMICAL JOURNAL,130(2),418-424. |
| MLA | Cui XH,et al."Testing the universal structured jet models of gamma-ray bursts with BATSE observations".ASTRONOMICAL JOURNAL 130.2(2005):418-424. |
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| Testing the Universa（309KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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