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LONG-TERM OPTICAL OBSERVATIONS OF THE Be/X-RAY BINARY X PER
Li, Hui1,2; Yan, Jingzhi1; Zhou, Jianeng1,2; Liu, Qingzhong1
2014-12-01
Source PublicationASTRONOMICAL JOURNAL
ISSN0004-6256
Volume148Issue:6Pages:113
AbstractWe 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.
KeywordStars: Emission-line, Be Stars: Individual (x Per) Stars: Neutron X-rays: Binaries
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-6256/148/6/113
WOS KeywordII EMISSION-LINES ; TIMING EXPLORER ; PHASE-CHANGES ; NEUTRON-STAR ; H-ALPHA ; FE-II ; PERSEI ; DISKS ; VARIABILITY ; PHOTOMETRY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000345223200010
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/11564
Collection太阳高能及相关物理过程研究团组
Affiliation1.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
Recommended Citation
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.
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