Short GRB 160821B: A Reverse Shock, a Refreshed Shock, and a Well-sampled Kilonova
Lamb,G. P.1; Tanvir,N. R.1; Levan,A. J.2,3; Postigo,A. de Ugarte4,5; Kawaguchi,K.6,7; Corsi,A.8; Evans,P. A.1; Gompertz,B.2; Malesani,D. B.5,9; Page,K. L.1; Wiersema,K.1,2; Rosswog,S.10; Shibata,M.7,11; Tanaka,M.12; Horst,A. J. van der13,14; Cano,Z.15; Fynbo,J. P. U.9; Fruchter,A. S.16; Greiner,J.17; Heintz,K. E.18; Higgins,A.1; Hjorth,J.5; Izzo,L.4; Jakobsson,P.18; Kann,D. A.4; O’Brien,P. T.1; Perley,D. A.19; Pian,E.20; Pugliese,G.21; Starling,R. L. C.1; Th?ne,C. C.4; Watson,D.9; Wijers,R. A. M. J.21; Xu,D.22
Source PublicationThe Astrophysical Journal
AbstractAbstract 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.
Keywordgamma-ray burst: individual (GRB 160821B) stars: neutron
WOS IDIOP:0004-637X-883-1-ab38bb
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.University of Leicester, Department of Physics & Astronomy and Leicester Institute of Space & Earth Observation, University Road, Leicester, LE1 7RH, UK
2.Department of Physics, University of Warwick, Coventry, CV4 7AL, UK
3.Department of Astrophysics, Radboud University, 6525 AJ Nijmegen, The Netherlands
4.Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, E-18008 Granada, Spain
5.DARK, Niels Bohr Institute, University of Copenhagen, Lyngbyvej 2, DK-2100 Copenhagen ?, Denmark
6.Institute for Cosmic Ray Research, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan
7.Center for Gravitational Physics, Yukawa Institute for Theoretical physics, Kyoto University, Kyoto 606-8502, Japan
8.Department of Physics and Astronomy, Texas Tech University, Lubbock, TX 79409, USA
9.The Cosmic DAWN Center, Niels Bohr Institute, University of Copenhagen, Lyngbyvej 2, DK-2100 Copenhagen ?, Denmark
10.The Oskar Klein Centre, Department of Astronomy, AlbaNova, Stockholm University, SE-106 91 Stockholm, Sweden
11.Max Plank Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1, Potsdam-Golm, D-14476, Germany
12.Astronomical Institute, Tohoku University, Aoba, Sendai 980-8578, Japan
13.Department of Physics, The George Washington University, 725 21st Street NW, Washington, DC 20052, USA
14.Astronomy, Physics, and Statistics Institute of Sciences (APSIS), 725 21st Street NW, Washington, DC 20052, USA
15.Berkshire College of Agriculture, Hall Place, Burchett’s Green Road, Burchett’s Green, Maidenhead, UK
16.Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
17.Max-Planck Institut für extraterrestrische Physik, D-85748 Garching, Giessenbachstr. 1, Germany
18.Centre for Astrophysics and Cosmology, Science Institute, University of Iceland, Dunhagi 5, 107 Reykjavík, Iceland
19.Astrophysics Research Institute, Liverpool John Moores University, IC2, Liverpool Science Park, 146 Brownlow Hill, Liverpool L3 5RF, UK
20.INAF, Astrophysics and Space Science Observatory, via P. Gobetti 101, I-40129 Bologna, Italy
21.Astronomical Institute Anton Pannekoek, University of Amsterdam, PO Box 94249, 1090 GE Amsterdam, The Netherlands
22.CAS Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China
Recommended Citation
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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