Super-eddington accretion onto the galactic ultraluminous x-ray pulsar swift j0243.6+6124
文献类型:期刊论文
作者 | Tao,Lian1; Feng,Hua2; Zhang,Shuangnan1,3,4; Bu,Qingcui1; Zhang,Shu1; Qu,Jinlu1; Zhang,Yue1,4 |
刊名 | The astrophysical journal |
出版日期 | 2019-02-28 |
卷号 | 873期号:1 |
ISSN号 | 0004-637X |
关键词 | Accretion, accretion disks Magnetic fields Pulsars: individual (swift j0243.6+6124) Stars: neutron X-rays: binaries |
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 |
URI标识 | http://www.irgrid.ac.cn/handle/1471x/2175734 |
专题 | 高能物理研究所 |
作者单位 | 1.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 2.Department of Engineering Physics and Center for Astrophysics, Tsinghua University, Beijing 100084, People’s Republic of China 3.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, 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). |
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来源:高能物理研究所
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