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Swift Observations of SMC X-3 during Its 2016-2017 Super-Eddington Outburst
Weng, Shan-Shan1,2; Ge, Ming-Yu3; Zhao, Hai-Hui1,2; Wang, Wei4,5; Zhang, Shuang-Nan3,5,6; Bian, Wei-Hao1,2; Yuan, Qi-Rong1,2
2017-07-01
发表期刊ASTROPHYSICAL JOURNAL
卷号843期号:1
摘要The Be X-ray pulsar SMC X-3 underwent a giant outburst from 2016 August to 2017 March, which was monitored with the Swift satellite. During the outburst, its broadband flux increased dramatically, and the unabsorbed X-ray luminosity reached an extreme value of similar to 10(39) erg s(-1) around August 24. Using the Swift/XRT data, we measured the observed pulse frequency of the neutron star to compute the orbital parameters of the binary system. After applying the orbital corrections to Swift observations, we found that the spin frequency increased steadily from 128.02 mHz on August 10 and approached the spin equilibrium of similar to 128.74 mHz in 2017 January with an unabsorbed luminosity of L-X similar to 2 x 10(37) erg s(-1), indicating a strong dipolar magnetic field of B similar to 6.8 x 10(12) G at the neutron star surface. The spin-up rate is tightly correlated with its X-ray luminosity during the super-Eddington outburst. The pulse profile in the Swift/XRT data is variable, showing double peaks at the early stage of outburst and then merging into a single peak at low luminosity. Additionally, we report that a low-temperature (kT similar to 0.2 keV) thermal component emerges in the phase-averaged spectra as the flux decays, and it may be produced from the outer truncated disk or the boundary layer between the exterior flow and the magnetosphere.
文章类型Article
关键词Pulsars: General Accretion Stars: Neutron Accretion Disks X-rays: Binaries X-rays: Individual (Smc X-3)
WOS标题词Science & Technology ; Physical Sciences
资助者National Natural Science Foundation of China(11303022 ; National Natural Science Foundation of China(11303022 ; National Program on Key Research and Development Project(2016YFA0400802 ; National Program on Key Research and Development Project(2016YFA0400802 ; Special Research Fund for the Doctoral Program of Higher Education(20133207110006) ; Special Research Fund for the Doctoral Program of Higher Education(20133207110006) ; 11133002 ; 11133002 ; 2016YFA0400803) ; 2016YFA0400803) ; 11233001 ; 11233001 ; 11573023 ; 11573023 ; 11173016 ; 11173016 ; 11673013 ; 11673013 ; 11373024 ; 11373024 ; 11233003 ; 11233003 ; 11503027 ; 11503027 ; 11622326 ; 11622326 ; 11433005) ; 11433005) ; National Natural Science Foundation of China(11303022 ; National Natural Science Foundation of China(11303022 ; National Program on Key Research and Development Project(2016YFA0400802 ; National Program on Key Research and Development Project(2016YFA0400802 ; Special Research Fund for the Doctoral Program of Higher Education(20133207110006) ; Special Research Fund for the Doctoral Program of Higher Education(20133207110006) ; 11133002 ; 11133002 ; 2016YFA0400803) ; 2016YFA0400803) ; 11233001 ; 11233001 ; 11573023 ; 11573023 ; 11173016 ; 11173016 ; 11673013 ; 11673013 ; 11373024 ; 11373024 ; 11233003 ; 11233003 ; 11503027 ; 11503027 ; 11622326 ; 11622326 ; 11433005) ; 11433005)
DOI10.3847/1538-4357/aa76ec
关键词[WOS]SMALL-MAGELLANIC-CLOUD ; X-RAY BINARIES ; MAGNETIZED NEUTRON-STARS ; NUSTAR J095551+6940.8 ; ACCRETION LUMINOSITY ; ECLIPSING BINARIES ; GIANT OUTBURST ; MILKY-WAY ; PULSARS ; EVOLUTION
收录类别SCI
语种英语
资助者National Natural Science Foundation of China(11303022 ; National Natural Science Foundation of China(11303022 ; National Program on Key Research and Development Project(2016YFA0400802 ; National Program on Key Research and Development Project(2016YFA0400802 ; Special Research Fund for the Doctoral Program of Higher Education(20133207110006) ; Special Research Fund for the Doctoral Program of Higher Education(20133207110006) ; 11133002 ; 11133002 ; 2016YFA0400803) ; 2016YFA0400803) ; 11233001 ; 11233001 ; 11573023 ; 11573023 ; 11173016 ; 11173016 ; 11673013 ; 11673013 ; 11373024 ; 11373024 ; 11233003 ; 11233003 ; 11503027 ; 11503027 ; 11622326 ; 11622326 ; 11433005) ; 11433005) ; National Natural Science Foundation of China(11303022 ; National Natural Science Foundation of China(11303022 ; National Program on Key Research and Development Project(2016YFA0400802 ; National Program on Key Research and Development Project(2016YFA0400802 ; Special Research Fund for the Doctoral Program of Higher Education(20133207110006) ; Special Research Fund for the Doctoral Program of Higher Education(20133207110006) ; 11133002 ; 11133002 ; 2016YFA0400803) ; 2016YFA0400803) ; 11233001 ; 11233001 ; 11573023 ; 11573023 ; 11173016 ; 11173016 ; 11673013 ; 11673013 ; 11373024 ; 11373024 ; 11233003 ; 11233003 ; 11503027 ; 11503027 ; 11622326 ; 11622326 ; 11433005) ; 11433005)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000404847500005
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8816
专题光学天文研究部
作者单位1.Nanjing Normal Univ, Dept Phys, Nanjing 210023, Jiangsu, Peoples R China
2.Nanjing Normal Univ, Inst Theoret Phys, Nanjing 210023, Jiangsu, Peoples R China
3.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
4.Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China
5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
6.Univ Chinese Acad Sci, Beijing, Peoples R China
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Weng, Shan-Shan,Ge, Ming-Yu,Zhao, Hai-Hui,et al. Swift Observations of SMC X-3 during Its 2016-2017 Super-Eddington Outburst[J]. ASTROPHYSICAL JOURNAL,2017,843(1).
APA Weng, Shan-Shan.,Ge, Ming-Yu.,Zhao, Hai-Hui.,Wang, Wei.,Zhang, Shuang-Nan.,...&Yuan, Qi-Rong.(2017).Swift Observations of SMC X-3 during Its 2016-2017 Super-Eddington Outburst.ASTROPHYSICAL JOURNAL,843(1).
MLA Weng, Shan-Shan,et al."Swift Observations of SMC X-3 during Its 2016-2017 Super-Eddington Outburst".ASTROPHYSICAL JOURNAL 843.1(2017).
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