中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
The unpolarized macronova associated with the gravitational wave event GW 170817

文献类型:期刊论文

AuthorCovino, 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
SourceNATURE ASTRONOMY
Issued Date2017-11-01
Volume1Issue:11Pages:791-794
ISSN2397-3366
DOI10.1038/s41550-017-0285-z
Rank第24完成单位
SubtypeArticle
English Abstract

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.

Subject天文学 ; 天体物理学 ; 高能天体物理学
URL查看原文
Publish PlaceMACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
WOS KeywordGAMMA-RAY BURSTS ; COMPACT OBJECT MERGERS ; NEUTRON-STAR MERGERS ; POLARIZATION ; NUCLEOSYNTHESIS ; AFTERGLOW ; LIGHT
Funding ProjectAgenzia 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] ; National Natural Science Foundation of China[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]
WOS Research AreaAstronomy & Astrophysics
Language英语
WOS IDWOS:000415271700008
PublisherNATURE PUBLISHING GROUP
Funding OrganizationAgenzia 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]
源URL[http://ir.ynao.ac.cn/handle/114a53/11952]  
Collection云南天文台_丽江天文观测站(南方基地)
Corresponding AuthorCovino, S.
Affiliation1.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
Recommended Citation
GB/T 7714
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..,...&Wijers, R. A. M. J..(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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