LONG-TERM OPTICAL OBSERVATIONS OF THE Be/X-RAY BINARY X PER
文献类型：期刊论文
| 作者 | Li, Hui1,2 ; Yan, Jingzhi1; Zhou, Jianeng1,2; Liu, Qingzhong1
|
| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2014-12-01 |
| 卷号 | 148期号:6页码:113 |
| 关键词 | stars: emission-line, Be stars: individual (X Per) stars: neutron X-rays: binaries |
| ISSN号 | 0004-6256 |
| 英文摘要 | We present optical spectroscopic observations of X Per from 1999 to 2013 with the 2.16 m telescope at Xinglong Station and the 2.4 m telescope at Lijiang Station, National Astronomical Observatories of China. Combining these observations with the public optical photometric data, we find certain epochs of anti-correlations between the optical brightness and the intensity of the Ha and He I 6678 lines, which may be attributed to the mass ejections from the Be star; however, alternative explanations are also possible. The variability of the Fe II 6317 line in the spectra of X Per might also be caused by the shocked waves formed after the mass ejections from the Be star. The X-ray activities of the system might also be connected with the mass ejection events from the Be star. When the ejected materials were transported from the surface of the Be star to the orbit of the neutron star, an X-ray flare could be observed in its X-ray light curves. We use the neutron star as a probe to constrain the motion of the ejected material in the circumstellar disk. With the diffusion time of the ejected material from the surface of the Be star to the orbit of neutron star, the viscosity parameter a of the circumstellar disk is estimated to be 0.39 and 0.28 for the different times, indicating that the disk around the Be star may be truncated by the neutron star at the 2:1 resonance radius and that a Type I X-ray outburst is unlikely to be observed in X Per. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | 天文和天体物理 |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | II EMISSION-LINES ; TIMING EXPLORER ; PHASE-CHANGES ; NEUTRON-STAR ; H-ALPHA ; FE-II ; PERSEI ; DISKS ; VARIABILITY ; PHOTOMETRY |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000345223200010 |
| 公开日期 | 2015-05-22 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/11564]  |
| 专题 | 紫金山天文台_太阳高能及相关物理过程研究团组 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Hui,Yan, Jingzhi,Zhou, Jianeng,et al. LONG-TERM OPTICAL OBSERVATIONS OF THE Be/X-RAY BINARY X PER[J]. ASTRONOMICAL JOURNAL,2014,148(6):113. |
| APA | Li, Hui,Yan, Jingzhi,Zhou, Jianeng,&Liu, Qingzhong.(2014).LONG-TERM OPTICAL OBSERVATIONS OF THE Be/X-RAY BINARY X PER.ASTRONOMICAL JOURNAL,148(6),113. |
| MLA | Li, Hui,et al."LONG-TERM OPTICAL OBSERVATIONS OF THE Be/X-RAY BINARY X PER".ASTRONOMICAL JOURNAL 148.6(2014):113. |
入库方式： OAI收割
来源：紫金山天文台
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