The luminosity function and formation rate of a complete sample of long gamma-ray bursts
文献类型：期刊论文
| 作者 | Lan, Guang-Xuan1,2; Zeng, Hou-Dun1; Wei, Jun-Jie1; Wu, Xue-Feng1,2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2019-10-01 |
| 卷号 | 488期号:4页码:4607-4613 |
| ISSN号 | 0035-8711 |
| 关键词 | methods: statistical stars: formation gamma-ray burst: general |
| DOI | 10.1093/mnras/stz2011 |
| 通讯作者 | Wei, Jun-Jie(jjwei@pmo.ac.cn) |
| 英文摘要 | We study the luminosity function and formation rate of long gamma-ray bursts (GRBs) by using a maximum likelihood method. This is the first time this method is applied to a well-defined sample of GRBs that is complete in redshift. The sample is composed of 99 bursts detected by the Swift satellite, 81 of them with measured redshift and luminosity for a completeness level of . We confirm that a strong redshift evolution in luminosity (with an evolution index of ) or in density () is needed in order to reproduce the observations well. But since the predicted redshift and luminosity distributions in the two scenarios are very similar, it is difficult to distinguish between these two kinds of evolutions only on the basis of the current sample. Furthermore, we also consider an empirical density case in which the GRB rate density is directly described as a broken power-law function and the luminosity function is taken to be non-evolving. In this case, we find that the GRB formation rate rises like for and is proportional to for . The local GRB rate is Gpc(-3)yr(-1). The GRB rate may be consistent with the cosmic star formation rate (SFR) at , but shows an enhancement compared to the SFR at z greater than or similar to 2. |
| WOS关键词 | COSMIC STAR-FORMATION ; REDSHIFT DISTRIBUTION ; COSMOLOGICAL TESTS ; SPECTRAL CATALOG ; JET STRUCTURE ; SWIFT ; EVOLUTION ; SELECTION ; MODEL ; BLAZARS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000484349700014 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/27912]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Wei, Jun-Jie |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210034, Jiangsu, Peoples R China 2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lan, Guang-Xuan,Zeng, Hou-Dun,Wei, Jun-Jie,et al. The luminosity function and formation rate of a complete sample of long gamma-ray bursts[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,488(4):4607-4613. |
| APA | Lan, Guang-Xuan,Zeng, Hou-Dun,Wei, Jun-Jie,&Wu, Xue-Feng.(2019).The luminosity function and formation rate of a complete sample of long gamma-ray bursts.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,488(4),4607-4613. |
| MLA | Lan, Guang-Xuan,et al."The luminosity function and formation rate of a complete sample of long gamma-ray bursts".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 488.4(2019):4607-4613. |
入库方式： OAI收割
来源：紫金山天文台
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