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, Lian ; Zhang, Yue; Feng, Hua; Zhang, Shuangnan; Bu, Qingcui; Zhang,Shu; Qu, Jinlu
|
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2019 |
| 卷号 | 873 |
| 关键词 | accretion accretion disks magnetic fields pulsars: individual: Swift J0243.6+6124 stars: neutron X-rays: binaries Astrophysics - High Energy Astrophysical Phenomena |
| DOI | 10.3847/1538-4357/ab0211 |
| 英文摘要 | 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. |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/282339]  |
| 专题 | 硬X射线调制望远镜卫星 高能物理研究所_粒子天体物理中心 中国科学院高能物理研究所 |
| 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 | Tao, Lian,Zhang, Yue,Feng, Hua,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.,Zhang, Yue.,Feng, Hua.,Zhang, Shuangnan.,Bu, Qingcui.,...&Qu, Jinlu.(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). |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。