Super-Eddington Accretion onto the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124

doi:10.3847/1538-4357/ab0211

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	Super-Eddington Accretion onto the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124
	Tao,Lian 2; Feng,Hua 3; Zhang,Shuangnan 1,2,4; Bu,Qingcui 2; Zhang,Shu 2; Qu,Jinlu 2; Zhang,Yue 2,4
刊名	The Astrophysical Journal
	2019-02-28
卷号	873 期号:1
关键词	accretion, accretion disks magnetic fields pulsars: individual (Swift J0243.6+6124) stars: neutron X-rays: binaries
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab0211
英文摘要	Abstract We report on the spectral behavior of the first Galactic ultraluminous X-ray pulsar Swift?J0243.6+6124 with NuSTAR observations during its 2017–2018 outburst. At sub-Eddington levels, the source spectrum is characterized by three emission components: from the accretion column, the hot spot, and a broad iron line emission region. When the source is above the Eddington limit, the hot spot temperature increases and the spectrum features two more blackbody components. One blackbody component has a radius of 10–20 km and likely originate from the top of the accretion column. The other one saturates at a blackbody luminosity of (1–2)?×?1038 erg s?1, coincident with the Eddington limit of a neutron star. This is consistent with the scenario that super-Eddington accretion onto compact objects will power optically thick outflows and indicates an accretion rate 60–80 times the critical value. This suggests that super-Eddington accretion onto magnetized systems can also power massive winds. At super-Eddington levels, the iron line becomes more significant and blueshifted, and is argued to be associated with the ultrafast wind in the central funnel or jets. This source, if located in external galaxies, will appear like other ultraluminous pulsars.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-873-1-AB0211
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/25267]
专题	中国科学院国家天文台
作者单位	1.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China 2.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 3.Department of Engineering Physics and Center for Astrophysics, Tsinghua University, Beijing 100084, People’s Republic of China 4.University of the Chinese Academy of Sciences, Beijing, People’s Republic of China
推荐引用方式 GB/T 7714	Tao,Lian,Feng,Hua,Zhang,Shuangnan,et al. Super-Eddington Accretion onto the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124[J]. The Astrophysical Journal,2019,873(1).
APA	Tao,Lian.,Feng,Hua.,Zhang,Shuangnan.,Bu,Qingcui.,Zhang,Shu.,...&Zhang,Yue.(2019).Super-Eddington Accretion onto the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124.The Astrophysical Journal,873(1).
MLA	Tao,Lian,et al."Super-Eddington Accretion onto the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124".The Astrophysical Journal 873.1(2019).