中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
A comparison between SALT/SAAO observations and kilonova models for AT 2017gfo: the first electromagnetic counterpart of a gravitational wave transient-GW170817

文献类型:期刊论文

作者Buckley, David A. H.1,2; Andreoni, Igor3,4,5; Barway, Sudhanshu1; Cooke, Jeff3,4,6; Crawford, Steven M.1,2; Gorbovskoy, Evgeny7; Gromadzki, Mariusz8; Lipunov, Vladimir7,9; Mao JR(毛基荣)10,11,12; Potter, Stephen B.1
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2018-02-01
卷号474期号:1页码:L71-L75
ISSN号0035-8711
关键词Gravitational Waves Binaries: Close Gamma-ray Burst: Individual: Grb 170817a Stars: Neutron Nuclear Reactions Stars: Winds Nucleosynthesis Outflows Abundances
DOI10.1093/mnrasl/slx196
产权排序第10完成单位
文献子类Article
英文摘要

We report on SALT low-resolution optical spectroscopy and optical/IR photometry undertaken with other SAAO telescopes (MASTER-SAAO and IRSF) of the kilonova AT 2017gfo (a.k.a. SSS17a) in the galaxy NGC4993 during the first 10 d of discovery. This event has been identified as the first ever electromagnetic counterpart of a gravitational wave event, namely GW170817, which was detected by the LIGO and Virgo gravitational wave observatories. The event is likely due to a merger of two neutron stars, resulting in a kilonova explosion. SALT was the third observatory to obtain spectroscopy of AT 2017gfo and the first spectrum, 1.2 d after the merger, is quite blue and shows some broad features, but no identifiable spectral lines and becomes redder by the second night. We compare the spectral and photometric evolution with recent kilonova simulations and conclude that they are in qualitative agreement for post-merger wind models with proton: nucleon ratios of Y-e = 0.25-0.30. The blue colour of the first spectrum is consistent with the lower opacity of the lanthanide-free r-process elements in the ejecta. Differences between the models and observations are likely due to the choice of system parameters combined with the absence of atomic data for more elements in the ejecta models.

学科主题天文学
URL标识查看原文
出版地GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
WOS关键词NEUTRON-STAR MERGERS ; R-PROCESS ; NUCLEOSYNTHESIS ; BURSTS
资助项目Southern African Large Telescope (SALT) under the Director's Discretionary Time programme[2017-1-DDT-009] ; National Research Foundation (NRF) of South Africa ; PolishNCN grant[OPUS 2015/17/B/ST9/03167] ; Hundred Talent Program ; Chinese Academy of Sciences[KJZD-EW-M06] ; National Natural Science Foundation of China[11673062] ; Overseas Talent Program of Yunnan Province ; Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav)[CE170100004] ; Australian Research Council Future fellowship[FT130101219] ; MNiSW[DIR/WK/2016/07]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000425491400015
资助机构Southern African Large Telescope (SALT) under the Director's Discretionary Time programme[2017-1-DDT-009] ; National Research Foundation (NRF) of South Africa ; PolishNCN grant[OPUS 2015/17/B/ST9/03167] ; Hundred Talent Program ; Chinese Academy of Sciences[KJZD-EW-M06] ; National Natural Science Foundation of China[11673062] ; Overseas Talent Program of Yunnan Province ; Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav)[CE170100004] ; Australian Research Council Future fellowship[FT130101219] ; MNiSW[DIR/WK/2016/07]
源URL[http://ir.ynao.ac.cn/handle/114a53/12289]  
专题云南天文台_丽江天文观测站(南方基地)
云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Buckley, David A. H.
作者单位1.South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa
2.Southern African Large Telescope Foundation, PO Box 9, Observatory 7935, Cape Town, South Africa
3.Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, H29, Hawthorn, VIC 3122, Australia
4.The Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav), Australia
5.Australian Astronomical Observatory, 105 Delhi Rd, North Ryde NSW 2113, Australia
6.The Australian Research Council Centre of Excellence for All-Sky Astrophysics (CAASTRO), Australia
7.M.V.Lomonosov Moscow State University, Sternberg Astronomical Institute, Universitetsky pr., 13, Moscow, 119234, Russia
8.Warsaw University Astronomical Observatory, Al. Ujazdowskie 4, PL-00-478, Warszawa, Poland
9.M.V.Lomonosov Moscow State University, Physics Department, Leninskie gory, GSP-1, Moscow, 119991, Russia
10.Yunnan Observatories, Chinese Academy of Sciences, 650011 Kunming, Yunnan Province, China
推荐引用方式
GB/T 7714
Buckley, David A. H.,Andreoni, Igor,Barway, Sudhanshu,et al. A comparison between SALT/SAAO observations and kilonova models for AT 2017gfo: the first electromagnetic counterpart of a gravitational wave transient-GW170817[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,474(1):L71-L75.
APA Buckley, David A. H..,Andreoni, Igor.,Barway, Sudhanshu.,Cooke, Jeff.,Crawford, Steven M..,...&Williams, Ted B..(2018).A comparison between SALT/SAAO observations and kilonova models for AT 2017gfo: the first electromagnetic counterpart of a gravitational wave transient-GW170817.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,474(1),L71-L75.
MLA Buckley, David A. H.,et al."A comparison between SALT/SAAO observations and kilonova models for AT 2017gfo: the first electromagnetic counterpart of a gravitational wave transient-GW170817".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 474.1(2018):L71-L75.

入库方式: OAI收割

来源:云南天文台

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。