| Diversity of multiwavelength emission bumps in the GRB100219A afterglow | |
Mao JR(毛基荣)1,2,3,4 ; Malesani, D5; D'Avanzo, P4; Covino, S4; Li SK(李少昆)2,3; Jakobsson, P6; Bai JM(白金明)2,3; Mao, J (reprint author), Korea Astron & Space Sci Inst, Div Space Sci, 776 Daedeokdae Ro, Taejon 305348, South Korea.
| |
| 发表期刊 | ASTRONOMY & ASTROPHYSICS
 |
| 2012-02 | |
| 卷号 | 538 |
| DOI | 10.1051/0004-6361/201117770 |
| 产权排序 | 第2完成单位 |
| 收录类别 | SCI ; EI |
| 关键词 | Shock Waves X-rays: General Dust Gamma Rays: General Extinction |
| 摘要 | Context. Multi-wavelength observations of gamma-ray burst (GRB) afterglows provide important information about the activity of their central engines and their environments. In particular, the short timescale variability, such as bumps and/or rebrightening features visible in the multi-wavelength light curves, is still poorly understood. Aims. We analyze the multi-wavelength observations of the GRB100219A afterglow at redshift 4.7. In particular, we attempt to identify the physical origin of the late achromatic flares/bumps detected in the X-ray and optical bands. Methods. We present ground-based optical photometric data and Swift X-ray observations on GRB100219A. We analyzed the temporal behavior of the X-ray and optical light curves, as well as the X-ray spectra. Results. The early flares in the X-ray and optical light curves peak simultaneously at about 1000 s after the burst trigger, while late achromatic bumps in the X-ray and optical bands appear at about 2 x 10(4) s after the burst trigger. These are uncommon features in the afterglow phenomenology. Considering the temporal and spectral properties, we argue that both optical and X-ray emissions come from the same mechanism. The late flares/bumps may be produced by late internal shocks from long-lasting activity of the central engine. An off-axis origin for a structured jet model is also discussed to interpret the bump shapes. The early optical bump can be interpreted as the afterglow onset, while the early X-ray flare could be caused by the internal activity. GRB100219A exploded in a dense environment as revealed by the strong attenuation of X-ray emission and the optical-to-X-ray spectral energy distribution. |
| 项目资助者 | Natural Science Foundation of China (NSFC) [10973034] ; 973 Program [2009CB824800] ; Danish National Research Foundation |
| 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:000300614100001 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | GAMMA-RAY BURSTS ; STANDARD ENERGY RESERVOIR ; INITIAL LORENTZ FACTOR ; X-RAY ; LIGHT CURVES ; THEORETICAL IMPLICATIONS ; OPTICAL AFTERGLOWS ; FLARING ACTIVITY ; PROMPT EMISSION ; SWIFT ERA |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/5024 |
| 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 | Mao, J (reprint author), Korea Astron & Space Sci Inst, Div Space Sci, 776 Daedeokdae Ro, Taejon 305348, South Korea. |
| 作者单位 | 1.Space Science DivisionKorea Astronomy and Space Science Institute, 776, Daedeokdae-ro, Yuseong-gu, 305-348 Daejeon, Republic of Korea 2.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming, 650011 Yunnan Province, PR China 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011 Yunnan Province, PR China 4.INAF – Osservatorio Astronomico di Brera, via Bianchi 46, 23807 Merate (LC), Italy 5.Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark 6.Centre for Astrophysics and Cosmology, Science Institute, University of Iceland, Dunhagi 5, 107 Reykjavik, Iceland |
| 推荐引用方式 GB/T 7714 | Mao JR,Malesani, D,D'Avanzo, P,et al. Diversity of multiwavelength emission bumps in the GRB100219A afterglow[J]. ASTRONOMY & ASTROPHYSICS,2012,538. |
| APA | Mao JR.,Malesani, D.,D'Avanzo, P.,Covino, S.,Li SK.,...&Mao, J .(2012).Diversity of multiwavelength emission bumps in the GRB100219A afterglow.ASTRONOMY & ASTROPHYSICS,538. |
| MLA | Mao JR,et al."Diversity of multiwavelength emission bumps in the GRB100219A afterglow".ASTRONOMY & ASTROPHYSICS 538(2012). |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Diversity of multiwa（484KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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。
修改评论