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The unpolarized macronova associated with the gravitational wave event GW 170817
Covino, S.1; Wiersema, K.2; Fan, Y. Z.3; Toma, K.4,5; Higgins, A. B.2; Melandri, A.1; D'Avanzo, P.1; Mundell, C. G.6; Palazzi, E.7; Tanvir, N. R.2; Bernardini, M. G.1,8; Branchesi, M.9,10; Brocato, E.11; Campana, S.1; Alighieri, S. di Serego12; Gotz, D.13; Fynbo, J. P. U.14; Gao, W.1,15; Gomboc, A.16; Gompertz, B.17; Greiner, J.18; Hjorth, J.14; Jin, Z. P.3; Kaper, L.19; Klose, S.20; Kobayashi, S.21; Kopac, D.22; Kouveliotou, C.27; Levan, A. J.23; Mao JR(毛基荣)24; Malesani, D.14; Pian, E.7; Rossi, A.7; Salvaterra, R.25; Starling, R. L. C.2; Steele, I.21; Tagliaferri, G.1; Troja, E.26; van der Horst, A. J.27,28; Wijers, R. A. M. J.19; Covino, S.(Ist Nazl Astrofis, Brera Astron Observ, Via Bianchi 46, I-23807 Merate, LC, Italy)
发表期刊NATURE ASTRONOMY
2017-11-01
卷号1期号:11页码:791-794
DOI10.1038/s41550-017-0285-z
产权排序第24完成单位
收录类别SCI
摘要The merger of two dense stellar remnants including at least one neutron star is predicted to produce gravitational waves (GWs) and short-duration gamma ray burststs. In the process, neutron-rich material is ejected from the system and heavy elements are synthesized by r-process nucleosynthesis(1,3). The radioactive decay of these heavy elements produces additional transient radiation termed kilonova or macronova(4-10). We report the detection of linear optical polarization, P= (0.50 +/- 0.07)%, 1.46 days after detection of the GWs from GW170817-a double neutron star merger associated with an optical macronova counterpart and a short gamma ray burst(11-14). The optical emission from a macronova is expected to be characterized by a blue, rapidly decaying component and a red, more slowly evolving component due to material rich in heavy elements-the lanthanidess(15). The polarization measurement was made when the macronova was still in its blue phase, during which there was an important contribution from a lanthanide-free outflow. The low degree of polarization is consistent with intrinsically unpolarized emission scattered by galactic dust, suggesting a symmetric geometry of the emitting region and low inclination of the merger system. Stringent upper limits to the polarization degree from 2.45-9.48 days post-burst are consistent with the lanthanides-rich macronova interpretation.
项目资助者Agenzia Spaziale Italiana-Istituto Nazionale di Astrofisica(1/004/11/3) ; Science and Technology Facilities Council ; VILLUM FONDEN Investigator grant(16599) ; National Natural Science Foundation of China(11525313, 11673062) ; UK Science and Technology Facilities Council ; Japan Society for the Promotion of Science(15H05437) ; Japan Science and Technology Consortia grant ; Major Program of the Chinese Academy of Sciences(KJZD-EW-M06)
语种英语
学科领域天文学
文章类型Article
ISSN2397-3366
URL查看原文
WOS记录号WOS:000415271700008
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]GAMMA-RAY BURSTS ; COMPACT OBJECT MERGERS ; NEUTRON-STAR MERGERS ; POLARIZATION ; NUCLEOSYNTHESIS ; AFTERGLOW ; LIGHT
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/11952
专题丽江天文观测站(南方基地)
通讯作者Covino, S.(Ist Nazl Astrofis, Brera Astron Observ, Via Bianchi 46, I-23807 Merate, LC, Italy)
作者单位1.Istituto Nazionale di Astrofisica / Brera Astronomical Observatory, via Bianchi 46, 23807 Merate (LC), Italy
2.Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK.
3.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China
4.Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-8578, Japan
5.Astronomical Institute, Tohoku University, Sendai 980-8578, Japan
6.Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, UK
7.Istituto Nazionale di Astrofisica / Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, Via Gobetti 101, 40129 Bologna, Italy
8.Laboratoire Univers et Particules de Montpellier, Université de Montpellier, Centre National de la Recherche Scientifique / IN2P3, Montpellier 34095, France
9.Gran Sasso Science Institute, 67100 L’Aquila, Italy
10.Istituto Nazionale di Fisica Nucleare / Laboratori Nazionali del Gran Sasso, 67100 L’Aquila, Italy
11.Istituto Nazionale di Astrofisica / Osservatorio Astronomico di Roma, Via di Frascati, 33, 00078 Monteporzio Catone, Italy
12.Istituto Nazionale di Astrofisica / Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
13.Commissariat à l’Énergie Atomique Saclay—Direction de la Recherche Fondamentale/Irfu/ Dèpartement d’Astrophysique, 91191 Gif-sur-Yvette, France
14.Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
15.Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210046, China
16.Centre for Astrophysics and Cosmology, University of Nova Gorica, Vipavska 11c, 5270 Ajdovščina, Slovenia
17.Space Telescope Science Institute, Baltimore, MD 21218, USA
18.Max-Planck-Institut für extraterrestrische Physik, Giessenbachstr. 1, 85748 Garching, Germany
19.Anton Pannekoek Institute, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
20.Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany
21.Astrophysics Research Institute, Liverpool John Moores University, ic2, Liverpool Science Park, 146 Brownlow Hill, Liverpool L3 5RF, UK
22.Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia
23.Department of Physics, University of Warwick, Coventry CV4 7AL, UK
24.Yunnan Observatories, Chinese Academy of Sciences, 650011 Kunming, Yunnan Province, China
25.Istituto Nazionale di Astrofisica / Istituto di Astrofisica Spaziale e Fisica Cosmica Milano, via E. Bassini 15, 20133 Milano, Italy
26.Department of Astronomy, University of Maryland, College Park, MD 20742, USA
27.27Department of Physics, The George Washington University, 725 21st Street NW, Washington, DC 20052, USA
28.Astronomy, Physics, and Statistics Institute of Sciences, Washington, DC 20052, USA
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Covino, S.,Wiersema, K.,Fan, Y. Z.,et al. The unpolarized macronova associated with the gravitational wave event GW 170817[J]. NATURE ASTRONOMY,2017,1(11):791-794.
APA Covino, S..,Wiersema, K..,Fan, Y. Z..,Toma, K..,Higgins, A. B..,...&Covino, S..(2017).The unpolarized macronova associated with the gravitational wave event GW 170817.NATURE ASTRONOMY,1(11),791-794.
MLA Covino, S.,et al."The unpolarized macronova associated with the gravitational wave event GW 170817".NATURE ASTRONOMY 1.11(2017):791-794.
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