| The X-ray light curve of gamma-ray bursts: clues to the central engine | |
Bernardini, MG1,2; Margutti, R1,3; Mao JR(毛基荣)4,5 ; Zaninoni, E1,6; Chincarini, G1,7; Bernardini, MG (reprint author), INAF Osservatorio Astron Brera, Via Bianchi 46, I-23807 Merate, LC, Italy.
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| 发表期刊 | ASTRONOMY & ASTROPHYSICS
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| 2012-03 | |
| 卷号 | 539 |
| DOI | 10.1051/0004-6361/201117895 |
| 产权排序 | 第4完成单位 |
| 收录类别 | SCI ; EI |
| 关键词 | Radiation Mechanisms: Non-thermal X-rays: General Gamma Rays: General |
| 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. |
| 项目资助者 | ASI [SWIFT I/011/07/0] ; Ministry of University and Research of Italy [MIUR 2007TNYZXL] ; MAE ; University of Milano Bicocca (Italy) |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-6361 |
| URL | 查看原文 |
| WOS记录号 | WOS:000303262000010 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | SWIFT XRT DATA ; COMPREHENSIVE ANALYSIS ; ENERGY INJECTION ; MILLISECOND PULSARS ; AFTERGLOW EMISSION ; FLARING ACTIVITY ; PROMPT EMISSION ; FLARES ; LONG ; GRBS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5021 |
| 专题 | 高能天体物理研究组 中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Bernardini, MG (reprint author), INAF Osservatorio Astron Brera, Via Bianchi 46, I-23807 Merate, LC, Italy. |
| 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,&Bernardini, MG .(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). |
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| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| The X-ray light curv（1619KB） | 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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