The X-ray light curve of gamma-ray bursts: clues to the central engine
文献类型：期刊论文
| 作者 | Bernardini, MG1,2; Margutti, R1,3; Mao JR(毛基荣)4,5 ; Zaninoni, E1,6; Chincarini, G1,7
|
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2012-03 |
| 卷号 | 539 |
| 关键词 | radiation mechanisms: non-thermal X-rays: general gamma rays: general |
| ISSN号 | 0004-6361 |
| 产权排序 | 第四完成单位 |
| 通讯作者 | Bernardini, MG (reprint author), INAF Osservatorio Astron Brera, Via Bianchi 46, I-23807 Merate, LC, Italy. |
| 英文摘要 | Aims. We present the analysis of a large sample of gamma-ray burst (GRB) X-ray light curves in the rest frame to characterise their intrinsic properties in the context of different theoretical scenarios. Methods. We determine the morphology, timescales, and energetics of 64 long GRBs observed by Swift/XRT without flaring activity. We furthermore provide a one-to-one comparison to the properties of GRBs with X-ray flares. Results. We find that the steep decay morphology and its connection with X-ray flares favour a scenario in which a central engine origin. We show that this scenario can also account for the shallow decay phase, provided that the GRB progenitor star has a self-similar structure with a constant envelope-to-core mass ratio similar to 0.02-0.03. However, difficulties arise for very long duration (t(p) greater than or similar to 10(4) s) shallow phases. Alternatively, a spinning-down magnetar whose emitted power refreshes the forward shock can quantitatively account for the shallow decay properties. In particular we demonstrate that this model can account for the plateau luminosity vs. end time anticorrelation. |
| 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] | SWIFT XRT DATA ; COMPREHENSIVE ANALYSIS ; ENERGY INJECTION ; MILLISECOND PULSARS ; AFTERGLOW EMISSION ; FLARING ACTIVITY ; PROMPT EMISSION ; FLARES ; LONG ; GRBS |
| 收录类别 | SCI ; EI |
| 原文出处 | http://www.aanda.org/articles/aa/abs/2012/03/aa17895-11/aa17895-11.html |
| 语种 | 英语 |
| WOS记录号 | WOS:000303262000010 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5021]  |
| 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 Bianchi 46, 23807 Merate (LC), Italy 2.ICRANet, p. le della Repubblica 10, 65100 Pescara, Italy 3.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA 4.Yunnan Observatory & Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011 Yunnan Province, PR China 5.International Center for Astrophysics, Korean Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon, Republic of Korea 6.University of Padova, Astronomy Dept., v. dell’Osservatorio 3, 35122 Padova, Italy 7.University of Milano Bicocca, Physics Dept., P.zza della Scienza 3, Milano 20126, Italy |
| 推荐引用方式 GB/T 7714 | Bernardini, MG,Margutti, R,Mao JR,et al. The X-ray light curve of gamma-ray bursts: clues to the central engine[J]. ASTRONOMY & ASTROPHYSICS,2012,539. |
| APA | Bernardini, MG,Margutti, R,Mao JR,Zaninoni, E,&Chincarini, G.(2012).The X-ray light curve of gamma-ray bursts: clues to the central engine.ASTRONOMY & ASTROPHYSICS,539. |
| MLA | Bernardini, MG,et al."The X-ray light curve of gamma-ray bursts: clues to the central engine".ASTRONOMY & ASTROPHYSICS 539(2012). |
入库方式： OAI收割
来源：云南天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。