IHEP OpenIR  > 硬X射线调制望远镜卫星
Super-Eddington Accretion onto the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124
Tao, Lian; Feng, Hua; Zhang, Shuangnan; Bu, Qingcui; Zhang,Shu; Qu, Jinlu; Zhang, Yue
2019
Source PublicationThe Astrophysical Journal
Volume 873
AbstractWe 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.
Keywordaccretion accretion disks magnetic fields pulsars: individual: Swift J0243.6+6124 stars: neutron X-rays: binaries Astrophysics - High Energy Astrophysical Phenomena
DOI10.3847/1538-4357/ab0211
Indexed ByADS
ADS Bibcode2019ApJ...873...19T
ADS URLhttps://ui.adsabs.harvard.edu/abs/2019ApJ...873...19T
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2019ApJ...873...19T/citations
Citation statistics
Cited Times:27 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/282339
Collection硬X射线调制望远镜卫星
中国科学院高能物理研究所
粒子天体物理中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
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.
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.
MLA Tao, Lian,et al."Super-Eddington Accretion onto the Galactic Ultraluminous X-Ray Pulsar Swift J0243.6+6124".The Astrophysical Journal  873(2019).
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