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DISCERNING THE PHYSICAL ORIGINS OF COSMOLOGICAL GAMMA-RAY BURSTS BASED ON MULTIPLE OBSERVATIONAL CRITERIA: THE CASES OF z=6.7 GRB 080913, z=8.2 GRB 090423, AND SOME SHORT/HARD GRBs
文献类型：期刊论文
| 作者 | Zhang, Bing1; Zhang, Bin-Bin1; Virgili, Francisco J.1; Liang, En-Wei2; Kann, D. Alexander3; Wu, Xue-Feng4,5 ; Proga, Daniel1; Lv, Hou-Jun2; Toma, Kenji4; Meszaros, Peter4,6
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2009-10-01 |
| 卷号 | 703期号:2页码:1696-1724 |
| ISSN号 | 0004-637X |
| 关键词 | gamma rays: bursts |
| 英文摘要 | The two high-redshift gamma- ray bursts, GRB 080913 at z = 6.7 and GRB 090423 at z = 8.2, recently detected by Swift appear as intrinsically short, hard GRBs. They could have been recognized by BATSE as short/hard GRBs should they have occurred at z <= 1. In order to address their physical origin, we perform a more thorough investigation on two physically distinct types (Type I/II) of cosmological GRBs and their observational characteristics. We reiterate the definitions of Type I/II GRBs and then review the following observational criteria and their physical motivations: supernova (SN) association, specific star-forming rate (SFR) of the host galaxy, location offset, duration, hardness, spectral lag, statistical correlations, energetics and collimation, afterglow properties, redshift distribution, luminosity function, and gravitational wave signature. Contrary to the traditional approach of assigning the physical category based on the gamma- ray properties (duration, hardness, and spectral lag), we take an alternative approach to define the Type I and Type II Gold Samples using several criteria that are more directly related to the GRB progenitors (SN association, host galaxy type, and specific SFR). We then study the properties of the two Gold Samples and compare them with the traditional long/soft and short/ hard samples. We find that the Type II Gold Sample reasonably tracks the long/soft population, although it includes several intrinsically short (shorter than 1 s in the rest frame) GRBs. The Type I Gold Sample only has five GRBs, four of which are not strictly short but have extended emission. Other short/ hard GRBs detected in the Swift era represent the BATSE short/ hard sample well, but it is unclear whether all of them belong to Type I. We suggest that some (probably even most) high-luminosity short/ hard GRBs instead belong to Type II. Based on multiple observational criteria, we suggest that GRB 080913 and GRB 090423 are more likely Type II events. In general, we acknowledge that it is not always straightforward to discern the physical categories of GRBs, and re-emphasize the importance of invoking multiple observational criteria. We cautiously propose an operational procedure to infer the physical origin of a given GRB with available multiple observational criteria, with various caveats laid out. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | AFTERGLOW LIGHT CURVES ; STANDARD ENERGY RESERVOIR ; COMPACT OBJECT MERGERS ; SWIFT XRT DATA ; X-RAY ; HOST GALAXY ; SHORT-DURATION ; PEAK-ENERGY ; OPTICAL AFTERGLOW ; SPECTRAL LAGS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000269929500040 |
| 公开日期 | 2011-12-08 |
| 源URL | [http://159.226.72.40/handle/332002/1715]  |
| 专题 | 紫金山天文台_南极天文中心 |
| 作者单位 | 1.Univ Nevada, Dept Phys & Astron, Las Vegas, NV 89154 USA 2.Guangxi Univ, Dept Phys, Guangxi 530004, Peoples R China 3.Thuringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany 4.Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA 5.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 6.Penn State Univ, Dept Phys, University Pk, PA 16801 USA 7.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA |
| 推荐引用方式 GB/T 7714 | Zhang, Bing,Zhang, Bin-Bin,Virgili, Francisco J.,et al. DISCERNING THE PHYSICAL ORIGINS OF COSMOLOGICAL GAMMA-RAY BURSTS BASED ON MULTIPLE OBSERVATIONAL CRITERIA: THE CASES OF z=6.7 GRB 080913, z=8.2 GRB 090423, AND SOME SHORT/HARD GRBs[J]. ASTROPHYSICAL JOURNAL,2009,703(2):1696-1724. |
| APA | Zhang, Bing.,Zhang, Bin-Bin.,Virgili, Francisco J..,Liang, En-Wei.,Kann, D. Alexander.,...&Gehrels, Neil.(2009).DISCERNING THE PHYSICAL ORIGINS OF COSMOLOGICAL GAMMA-RAY BURSTS BASED ON MULTIPLE OBSERVATIONAL CRITERIA: THE CASES OF z=6.7 GRB 080913, z=8.2 GRB 090423, AND SOME SHORT/HARD GRBs.ASTROPHYSICAL JOURNAL,703(2),1696-1724. |
| MLA | Zhang, Bing,et al."DISCERNING THE PHYSICAL ORIGINS OF COSMOLOGICAL GAMMA-RAY BURSTS BASED ON MULTIPLE OBSERVATIONAL CRITERIA: THE CASES OF z=6.7 GRB 080913, z=8.2 GRB 090423, AND SOME SHORT/HARD GRBs".ASTROPHYSICAL JOURNAL 703.2(2009):1696-1724. |
入库方式： OAI收割
来源：紫金山天文台
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