The afterglow and kilonova of the short GRB 160821B

被引：120

作者：

Troja, E. ^{[1
,2
]}

Castro-Tirado, A. J. ^{[3
,4
]}

Becerra Gonzalez, J. ^{[5
,6
]}

Hu, Y. ^{[3
,7
]}

Ryan, G. S. ^{[1
,8
]}

Cenko, S. B. ^{[1
,2
,8
]}

Ricci, R. ^{[9
]}

Novara, G. ^{[10
,11
]}

Sanchez-Ramirez, R. ^{[12
]}

Acosta-Pulido, J. A. ^{[5
,6
]}

Ackley, K. D. ^{[13
]}

Caballero Garcia, M. D. ^{[14
]}

Eikenberry, S. S. ^{[13
]}

Guziy, S. ^{[15
]}

Jeong, S. ^{[16
]}

Lien, A. Y. ^{[2
]}

Marquez, I ^{[3
]}

Pandey, S. B. ^{[17
]}

Park, I. H. ^{[16
]}

Sakamoto, T. ^{[18
]}

Tello, J. C. ^{[14
]}

Sokolov, I., V ^{[19
]}

Sokolov, V. V. ^{[20
]}

Tiengo, A. ^{[10
,11
,21
]}

Valeev, A. F. ^{[20
]}

Zhang, B. B. ^{[22
,23
]}

Veilleux, S. ^{[1
,8
]}

机构：

[1] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[2] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA

[3] CSIC, IAA, Glorieta Astron Sn, E-18008 Granada, Spain

[4] Univ Malaga, ETS Ingenieros Ind, Unidad Asociada Dept Ingn Sistemas & Automat, Malaga, Spain

[5] Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain

[6] Inst Astrofis Canarias, E-38200 Tenerife, Spain

[7] Univ Granada, Fac Ciencias, Campus Fuentenueva S-N, E-18071 Granada, Spain

[8] Univ Maryland, Joint Space Sci Inst, College Pk, MD 20742 USA

[9] INAF, Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy

[10] Scuola Univ Super IUSS Pavia, Piazza Vittoria 15, I-27100 Pavia, Italy

[11] INAF, Ist Astrofis Spaziale & Fis Cosm Milano, Via E Bassini 15, I-20133 Milan, Italy

[12] INAF, Ist Astrofis & Planetol Spaziali, Via Fosso Cavaliere 100, I-00133 Rome, Italy

[13] Univ Florida, Dept Astron, Gainesville, FL 32611 USA

[14] Acad Sci, Astron Inst, Bocni 2 1401, Prague 14100 4, Czech Republic

[15] Nikolaev Natl Univ, Nikolska 24, UA-54030 Nikolayev, Ukraine

[16] SungKyunKwan Univ, Inst Sci & Technol Space, Suwon 16419, South Korea

[17] Aryabhatta Res Inst Observat Sci, Naini Tal 263002, India

[18] Aoyama Gakuin Univ, Dept Phys & Math, Chuo Ku, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 2525258, Japan

[19] RAS, Inst Astron, Terskol Branch, 48 Pyatnitskaya St, Moscow 119017, Russia

[20] RAS, Special Astrophys Observ, Nizhniy Arkhyz 369167, Zelenchukskiy R, Russia

[21] INFN, Ist Nazl Fis Nucl, Sez Pavia, Via A Bassi 6, I-27100 Pavia, Italy

[22] Nanjing Univ, Sch Astron & Space Sci, 163 Xian Lin Ave, Nanjing 210023, Jiangsu, Peoples R China

[23] Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing, Jiangsu, Peoples R China

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 489卷 / 02期

基金：

美国国家航空航天局; 美国国家科学基金会; 欧盟地平线“2020”;

关键词：

gravitational waves; nuclear reactions; nucleosynthesis; abundances; gamma-ray burst: general; stars: neutron; GAMMA-RAY BURST; R-PROCESS NUCLEOSYNTHESIS; PHOTON IMAGING CAMERA; STAR MERGER REMNANTS; LONG-TERM EVOLUTION; LIGHT CURVES; HOST GALAXY; ENERGY INJECTION; NEUTRON-STARS; BLACK-HOLES;

D O I：

10.1093/mnras/stz2255

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

GRB 160821B is a short duration gamma-ray burst (GRB) detected and localized by the Neil Gehrels Swift Observatory in the outskirts of a spiral galaxy at z = 0.1613, at a projected physical offset of 16 kpc from the galaxy's center. We present X-ray, optical/nIR, and radio observations of its counterpart and model them with two distinct components of emission: a standard afterglow, arising from the interaction of the relativistic jet with the surrounding medium, and a kilonova, powered by the radioactive decay of the sub-relativistic ejecta. Broadband modelling of the afterglow data reveals a weak reverse shock propagating backward into the jet, and a likely jet-break at 3.5 d. This is consistent with a structured jet seen slightly off-axis (theta(view) similar to theta(core)) while expanding into a low-density medium (n approximate to 10(-3) cm(-3)). Analysis of the kilonova properties suggests a rapid evolution towards red colours, similar to AT2017gfo, and a low-nIR luminosity, possibly due to the presence of a long-lived neutron star. The global properties of the environment, the inferred low mass (M-ej less than or similar to 0.006 M-circle dot) and velocities (v(ej) greater than or similar to 0.05c) of lanthanide-rich ejecta are consistent with a binary neutron star merger progenitor.

引用

页码：2104 / 2116

页数：13

共 141 条

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