The Orbital Modulation for the Spectrum and Mass Accretion Rate in Circinus X-1
文献类型：期刊论文
| 作者 | Ding, G.; C. Huang; J. Qu; Huang, Chunping ; Ding, Guoqiang
|
| 刊名 | International Journal of Astronomy and Astrophysics
 |
| 出版日期 | 2012 |
| 卷号 | 2期号:4页码:256-265 |
| 关键词 | Accretion Disk Compact Object Neutron Star Individual (Circinus X-1) |
| 英文摘要 | Using the data from the Proportional Counter Array on board the Rossi X-Ray Timing Explorer satellite, we study the orbital modulation for the spectrum and mass accretion rate of Cir X-1 during its two orbital periods. We use a model consisting of a blackbody, a multicolor disk blackbody, and a line component to fit the spectrum and find that the spec-trum is obviously modulated by the orbital phase. It is shown that the disk accretion rate in Cir X-1 undergoes three states during the orbital period. At the periastron with orbital phase 0 - 0.1, the disk accretion rate is sup-Eddington, then from phase 0.1 to the apastron (phase 0.5) it decreases dramatically and becomes near-Eddington, and from the apastron to the next periastron (phase 1) the disk accretion rate approximates Eddington and tends to be steady. We ar-gue that the evolution of the disk accretion rate is attributed to the high orbital eccentricity of this source. The mass ac-cretion rate onto the neutron star is much less than that onto the inner disk, indicating significant outflows in this source. |
| 收录类别 | 其他 |
| 语种 | 英语 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/657]  |
| 专题 | 高能天体物理研究团组 |
| 通讯作者 | Ding, Guoqiang |
| 推荐引用方式 GB/T 7714 | Ding, G.,C. Huang,J. Qu,et al. The Orbital Modulation for the Spectrum and Mass Accretion Rate in Circinus X-1[J]. International Journal of Astronomy and Astrophysics,2012,2(4):256-265. |
| APA | Ding, G.,C. Huang,J. Qu,Huang, Chunping,&Ding, Guoqiang.(2012).The Orbital Modulation for the Spectrum and Mass Accretion Rate in Circinus X-1.International Journal of Astronomy and Astrophysics,2(4),256-265. |
| MLA | Ding, G.,et al."The Orbital Modulation for the Spectrum and Mass Accretion Rate in Circinus X-1".International Journal of Astronomy and Astrophysics 2.4(2012):256-265. |
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