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LONG-TERM OPTICAL STUDIES OF THE BE/X-RAY BINARY RX J0440.9+4431/LS V+44 17
Yan, Jingzhi1; Zhang, Peng1,2; Liu, Wei1,2; Liu, Qingzhong1
2016-04-01
Source PublicationASTRONOMICAL JOURNAL
Volume151Issue:4
Abstractexisted in the circumstellar disk. Several positive and negative correlations between the V-band brightness and the H alpha intensity were found from the long-term photometric and spectroscopic observations. We suggest that the monotonic increase of the V-band brightness and the H alpha brightness between our 2005 and 2007 observations might be the result of a continuous mass ejection from the central Be star, while the negative correlation in 2007-2010 should be caused by the cessation of mass loss from the Be star just before the decline in V-band brightness began (around our 2007 observations). With the extension of the ejection material, the largest circumstellar disk during the last two decades has been observed in our 2010 observations with an equivalent width of approximately -12.88 angstrom, which corresponds to a circumstellar disk with a size of 12.9 times the radius of the central Be star. Three consecutive X-ray outbursts peaking around MJD. 55293, 55444, and 55591 might be connected with the largest circumstellar disk around the Be star. We also use the orbital motion of the neutron star as a probe to constrain the structure of the circumstellar disk and estimate the eccentricity of the binary system to be >= 0.4. After three years of the H alpha intensity decline after the X-ray outbursts, a new circumstellar disk was being formed around the Be star after our 2013 observations.
KeywordBinaries: General Stars: Emission-line, Be Stars: Individual (Rx j0440.9+4431) X-rays: Binaries
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3847/0004-6256/151/4/104
WOS Keyword4U 0115+63/V635 CASSIOPEIAE ; X-RAY ; EMISSION-LINES ; STARS ; VARIABILITY ; DISCOVERY ; OSCILLATIONS ; PHOTOMETRY ; ENVELOPES ; TELESCOPE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000375609100017
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16209
Collection宇宙伽马暴、中子星及相关物理研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Peoples R China
2.Univ Chinese Acad Sci, Yuquan Rd 19, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yan, Jingzhi,Zhang, Peng,Liu, Wei,et al. LONG-TERM OPTICAL STUDIES OF THE BE/X-RAY BINARY RX J0440.9+4431/LS V+44 17[J]. ASTRONOMICAL JOURNAL,2016,151(4).
APA Yan, Jingzhi,Zhang, Peng,Liu, Wei,&Liu, Qingzhong.(2016).LONG-TERM OPTICAL STUDIES OF THE BE/X-RAY BINARY RX J0440.9+4431/LS V+44 17.ASTRONOMICAL JOURNAL,151(4).
MLA Yan, Jingzhi,et al."LONG-TERM OPTICAL STUDIES OF THE BE/X-RAY BINARY RX J0440.9+4431/LS V+44 17".ASTRONOMICAL JOURNAL 151.4(2016).
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