The kHz QPOs as a probe of the X-ray color-color diagram and accretion-disk structure for the atoll source 4U 1728-34
文献类型：期刊论文
| 作者 | Zhang, Cheng-Min; Qu, Jin-Lu ; Wang, De-Hua; Qu JL(屈进禄)
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2018 |
| 卷号 | 618页码:A181 |
| 关键词 | X-rays: binaries stars: neutron stars: individual: 4U 1728-34 accretion, accretion disks |
| ISSN号 | 1432-0746 |
| DOI | 10.1051/0004-6361/201832651 |
| 文献子类 | Article |
| 英文摘要 | We have taken the kHz QPOs as a tool to probe the correlation between the tracks of X-ray color-color diagram (CCD) and magnetosphere-disk positions for the atoll source 4U 1728-34, based on the assumptions that the upper kHz QPO is ascribed to the Keplerian orbital motion and the neutron star (NS) magnetosphere is defined by the dipole magnetic field. We find that from the island to the banana state, the inner accretion disk gradually approaches the NS surface with the radius decreasing from r similar to 33.0 km to similar to 15.9 km, corresponding to the magnetic field from B(r) similar to 4.8 x 10(6) G to similar to 4.3 x 10(7) G. In addition, we note the characteristics of some particular radii of magnetosphere-disk r are.firstly, the whole atoll shape of the CCD links the disk radius range of similar to 15.9-33.0 km, which is just located inside the corotation radius of 4U 1728-34 r(infinity) (similar to 34.4 km), implying that the CCD shape is involved in the NS spin-up state. Secondly, the island and banana states of CCD correspond to the two particular boundaries.(I) near the corotation radius at r similar to 27.2-33.0 km, where the source lies in the island state; (II) near the NS surface at r similar to 15.9-22.3 km, where the source lies in both the island and banana states. Thirdly, the vertex of the atoll shape in CCD, where the radiation transition from the hard to soft photons occurs, is found to be near the NS surface at r similar to 16.4 km. The above results suggest that both the magnetic field and accretion environment are related to the CCD structure of atoll track, where the corotation radius and NS hard surface play the significant roles in the radiation distribution of atoll source. |
| WOS关键词 | QUASI-PERIODIC OSCILLATIONS ; NEUTRON-STAR ; MAGNETIC-FIELD ; XTE J1701-462 ; TIMING FEATURES ; SPECTRAL STATES ; LOW-FREQUENCY ; BINARIES ; EVOLUTION ; MODEL |
| WOS研究方向 | Psychiatry |
| 语种 | 英语 |
| WOS记录号 | WOS:000449280200001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286742]  |
| 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 | Zhang, Cheng-Min,Qu, Jin-Lu,Wang, De-Hua,et al. The kHz QPOs as a probe of the X-ray color-color diagram and accretion-disk structure for the atoll source 4U 1728-34[J]. ASTRONOMY & ASTROPHYSICS,2018,618:A181. |
| APA | Zhang, Cheng-Min,Qu, Jin-Lu,Wang, De-Hua,&屈进禄.(2018).The kHz QPOs as a probe of the X-ray color-color diagram and accretion-disk structure for the atoll source 4U 1728-34.ASTRONOMY & ASTROPHYSICS,618,A181. |
| MLA | Zhang, Cheng-Min,et al."The kHz QPOs as a probe of the X-ray color-color diagram and accretion-disk structure for the atoll source 4U 1728-34".ASTRONOMY & ASTROPHYSICS 618(2018):A181. |
入库方式： OAI收割
来源：高能物理研究所
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