Pulse phase-resolved analysis of SMC X-3 during its 2016-2017 super-Eddington outburst

doi:10.1007/s10509-017-3245-2

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	Pulse phase-resolved analysis of SMC X-3 during its 2016-2017 super-Eddington outburst
	Weng, SS; Ge MY(葛明玉); Yuan, QR; Bian, WH; Ge, MY; Zhao, HH
刊名	ASTROPHYSICS AND SPACE SCIENCE
	2018
卷号	363 期号:2 页码:21
关键词	Accretion, accretion disks Stars: neutron Pulsars: general X-rays: binaries X-rays: individual (SMC X-3)
ISSN号	0004-640X
DOI	10.1007/s10509-017-3245-2
文献子类	Article
英文摘要	The Be X-ray pulsar SMC X-3 underwent an extra long and ultraluminous giant outburst from 2016 August to 2017 March. The peak X-ray luminosity is up to similar to 10(39) erg/s, suggesting a mildly super-Eddington accretion onto the strongly magnetized neutron star. It therefore bridges the gap between the Galactic Be/X-ray binaries (L-X(peak) <= 10(38) erg/s) and the ultraluminous X-ray pulsars (L-X(peak) >= 10(40) erg/s) found in nearby galaxies. A number of observations were carried out to observe the outburst. In this paper, we perform a comprehensive phase-resolved analysis on the high quality data obtained with the Nustar and XMM-Newton, which were observed at a high and intermediate luminosity levels. In order to get a better understanding on the evolution of the whole extreme burst, we take the Swift results at the low luminosity state into account as well. At the early stage of outburst, the source shows a double-peak pulse profile, the second main peak approaches the first one and merges into the single peak at the low luminosity. The second main peak vanishes beyond 20 keV, and its radiation becomes much softer than that of the first main peak. The line widths of fluorescent iron line vary dramatically with phases, indicating a complicated geometry of accretion flows. In contrast to the case at low luminosity, the pulse fraction increases with the photon energy. The significant small pulse fraction detected below 1 keV can be interpreted as the existence of an additional thermal component located at far away from the central neutron star.
电子版国际标准刊号	1572-946X
WOS关键词	SMALL-MAGELLANIC-CLOUD ; X-RAY SOURCES ; NEUTRON-STARS ; ACCRETION ; LUMINOSITY ; EMISSION ; DISTANCE ; BINARIES ; PERIOD
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000424039100010
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285599]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Weng, SS,Ge MY,Yuan, QR,et al. Pulse phase-resolved analysis of SMC X-3 during its 2016-2017 super-Eddington outburst[J]. ASTROPHYSICS AND SPACE SCIENCE,2018,363(2):21.
APA	Weng, SS,葛明玉,Yuan, QR,Bian, WH,Ge, MY,&Zhao, HH.(2018).Pulse phase-resolved analysis of SMC X-3 during its 2016-2017 super-Eddington outburst.ASTROPHYSICS AND SPACE SCIENCE,363(2),21.
MLA	Weng, SS,et al."Pulse phase-resolved analysis of SMC X-3 during its 2016-2017 super-Eddington outburst".ASTROPHYSICS AND SPACE SCIENCE 363.2(2018):21.