Searching for differences in Swift's intermediate GRBs
文献类型：期刊论文
| 作者 | Postigo, AD1,2; Horvath, I3; Veres, P3,4; Bagoly, Z4; Kann, DA5; Thone, CC1; Balazs, LG6; D'Avanzo, P1; Aloy, MA7; Foley, S8,9 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2011-01 |
| 卷号 | 525 |
| ISSN号 | 0004-6361 |
| 关键词 | gamma-rays burst: general |
| 通讯作者 | Postigo, AD (reprint author), INAF Osservatorio Astron Brera, Via E Bianchi 46, I-23807 Merate, LC, Italy. |
| 产权排序 | 第十完成单位 |
| 英文摘要 | Context. Gamma-ray bursts are usually classified in terms their high-energy emission into either short-duration or long-duration bursts, which presumably reflect two different types of progenitors. However, it has been shown on statistical grounds that a third, intermediate population is needed in this classification scheme, although an extensive study of the properties of this class has so far not been performed. The large amount of follow-up studies generated during the Swift era allows us to have a sufficient sample to attempt a study of this third population through the properties of their prompt emission and their afterglows. Aims. To understand the differences of the intermediate population, we study a sample of GRBs observed by Swift during its first four years of operation. The sample contains only bursts with measured redshifts since these data help us to derive intrinsic properties. Methods. We search for differences in the properties of the three groups of bursts, which we quantify using a Kolmogorov-Smirnov test whenever possible. Results. Intermediate bursts are found to be less energetic and have dimmer afterglows than long GRBs, especially when considering the X-ray light curves, which are on average one order of magnitude fainter than long bursts. There is a less significant trend in the redshift distribution that places intermediate bursts closer than long bursts. Except for this, intermediate bursts show similar properties to long bursts. In particular, they follow the E-peak versus E-iso correlation and have, on average, positive spectral lags with a distribution similar to that of long bursts. As for long GRBs, they normally have an associated supernova, although some intermediate bursts have been found to contain no supernova component. Conclusions. This study shows that intermediate bursts differ from short bursts, but exhibit no significant differences from long bursts apart from their lower brightness. We suggest that the physical difference between intermediate and long bursts could be explained by being produced by similar progenitors, of the former being the ejecta thin shells and the latter thick shells. |
| 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] | GAMMA-RAY BURSTS ; CORE-COLLAPSE SUPERNOVAE ; STAR-FORMATION RATES ; HOST-GALAXY ; RELATIVISTIC OUTFLOWS ; OPTICAL AFTERGLOWS ; E-P,E-I-E-ISO CORRELATION ; LOCAL ENVIRONMENTS ; EXTENDED EMISSION ; BRIGHT SUPERNOVA |
| 收录类别 | SCI ; EI |
| 原文出处 | http://www.aanda.org/articles/aa/abs/2011/01/aa15261-10/aa15261-10.html |
| 语种 | 英语 |
| WOS记录号 | WOS:000285193700091 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5017]  |
| 专题 | 云南天文台_高能天体物理研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.INAF – Osservatorio Astronomico di Brera, via E. Bianchi 46, 23807 Merate, LC, Italy 2.European Southern Observatory, Casilla 19001, Santiago 19, Chile 3.Dept. of Physics, Bolyai Military University, POB 15, 1581 Budapest, Hungary 4.Dept. of Physics of Complex Systems, Eötvös University, Pázmány P. s. 1/A, 1117 Budapest, Hungary 5.Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany 6.Konkoly Observatory, 1525 Budapest, POB 67, Hungary 7.Departamento de Astronomía y Astrofísica, Universidad de Valencia, 46100 Burjassot, Spain 8.UCD School of Physics, University College Dublin, Dublin 4, Ireland 9.Max-Planck-Institut für extraterrestrische Physik, 85748 Garching, Germany 10.Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011, PR China |
| 推荐引用方式 GB/T 7714 | Postigo, AD,Horvath, I,Veres, P,et al. Searching for differences in Swift's intermediate GRBs[J]. ASTRONOMY & ASTROPHYSICS,2011,525. |
| APA | Postigo, AD.,Horvath, I.,Veres, P.,Bagoly, Z.,Kann, DA.,...&Nardini, M.(2011).Searching for differences in Swift's intermediate GRBs.ASTRONOMY & ASTROPHYSICS,525. |
| MLA | Postigo, AD,et al."Searching for differences in Swift's intermediate GRBs".ASTRONOMY & ASTROPHYSICS 525(2011). |
入库方式： OAI收割
来源：云南天文台
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