Swift? Observations of SMC X-3 during Its 2016–2017 Super-Eddington Outburst

doi:10.3847/1538-4357/aa76ec

CORC > 国家天文台 > 中国科学院国家天文台

	Swift? Observations of SMC X-3 during Its 2016–2017 Super-Eddington Outburst
	Weng,Shan-Shan 1; Ge,Ming-Yu 2; Zhao,Hai-Hui 1; Wang,Wei 3,4; Zhang,Shuang-Nan 2,4,5; Bian,Wei-Hao 1; Yuan,Qi-Rong 1
刊名	The Astrophysical Journal
	2017-07-05
卷号	843 期号:1
关键词	accretion, accretion disks pulsars: general stars: neutron X-rays: binaries X-rays: individual (SMC X-3)
ISSN号	0004-637X
DOI	10.3847/1538-4357/aa76ec
英文摘要	Abstract 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 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 ～128.74 mHz in 2017 January with an unabsorbed luminosity of erg s?1, indicating a strong dipolar magnetic field of 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 ( 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.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-843-1-AA76EC
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/35925]
专题	中国科学院国家天文台
作者单位	1.Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210023, China; wengss@njnu.edu.cn 2.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; gemy@ihep.ac.cn 3.School of Physics and Technology, Wuhan University, 430072 Wuhan, Hubei, China 4.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 5.University of the Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	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]. The 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.The Astrophysical Journal,843(1).
MLA	Weng,Shan-Shan,et al."Swift? Observations of SMC X-3 during Its 2016–2017 Super-Eddington Outburst".The Astrophysical Journal 843.1(2017).