Short GRB 160821B: A Reverse Shock, a Refreshed Shock, and a Well-sampled Kilonova
文献类型：期刊论文
| 作者 | Lamb,G. P.2; Tanvir,N. R.2; Levan,A. J.3,4; Postigo,A. de Ugarte5,6; Kawaguchi,K.7,8; Corsi,A.9; Evans,P. A.2; Gompertz,B.3; Malesani,D. B.6,10; Page,K. L.2 |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019-09-19 |
| 卷号 | 883期号:1 |
| 关键词 | gamma-ray burst: individual (GRB 160821B) stars: neutron |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab38bb |
| 英文摘要 | Abstract We report our identification of the optical afterglow and host galaxy of the short-duration gamma-ray burst sGRB 160821B. The spectroscopic redshift of the host is z?=?0.162, making it one of the lowest redshift short-duration gamma-ray bursts (sGRBs) identified by Swift. Our intensive follow-up campaign using a range of ground-based facilities as well as Hubble Space Telescope, XMM-Newton, and Swift, shows evidence for a late-time excess of optical and near-infrared emission in addition to a complex afterglow. The afterglow light curve at X-ray frequencies reveals a narrow jet, deg, that is refreshed at >1 day post-burst by a slower outflow with significantly more energy than the initial outflow that produced the main GRB. Observations of the 5 GHz radio afterglow shows a reverse shock into a mildly magnetized shell. The optical and near-infrared excess is fainter than AT2017gfo associated with GW170817, and is well explained by a kilonova with dynamic ejecta mass Mdyn?=?(1.0?±?0.6)?×?10?3 M⊙ and a secular (post-merger) ejecta mass with Mpm?=?(1.0?±?0.6)?×?10?2 M⊙, consistent with a binary neutron star merger resulting in a short-lived massive neutron star. This optical and near-infrared data set provides the best-sampled kilonova light curve without a gravitational wave trigger to date. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-883-1-AB38BB |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/27880]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Centre for Astrophysics and Cosmology, Science Institute, University of Iceland, Dunhagi 5, 107 Reykjavík, Iceland 2.University of Leicester, Department of Physics & Astronomy and Leicester Institute of Space & Earth Observation, University Road, Leicester, LE1 7RH, UK gpl6@leicester.ac.uk 3.Department of Physics, University of Warwick, Coventry, CV4 7AL, UK 4.Department of Astrophysics, Radboud University, 6525 AJ Nijmegen, The Netherlands 5.Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, E-18008 Granada, Spain 6.DARK, Niels Bohr Institute, University of Copenhagen, Lyngbyvej 2, DK-2100 Copenhagen ?, Denmark 7.Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan 8.Center for Gravitational Physics, Yukawa Institute for Theoretical physics, Kyoto University, Kyoto 606-8502, Japan 9.Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA 10.The Cosmic DAWN Center, Niels Bohr Institute, University of Copenhagen, Lyngbyvej 2, DK-2100 Copenhagen ?, Denmark |
| 推荐引用方式 GB/T 7714 | Lamb,G. P.,Tanvir,N. R.,Levan,A. J.,et al. Short GRB 160821B: A Reverse Shock, a Refreshed Shock, and a Well-sampled Kilonova[J]. The Astrophysical Journal,2019,883(1). |
| APA | Lamb,G. P..,Tanvir,N. R..,Levan,A. J..,Postigo,A. de Ugarte.,Kawaguchi,K..,...&Xu,D..(2019).Short GRB 160821B: A Reverse Shock, a Refreshed Shock, and a Well-sampled Kilonova.The Astrophysical Journal,883(1). |
| MLA | Lamb,G. P.,et al."Short GRB 160821B: A Reverse Shock, a Refreshed Shock, and a Well-sampled Kilonova".The Astrophysical Journal 883.1(2019). |
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