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题名: LONG-TERM OPTICAL STUDIES OF THE BE/X-RAY BINARY RX J0440.9+4431/LS V+44 17
作者: Yan JingZhi(颜景志)1; Zhang, Peng1, 2; Liu, Wei1, 2; Liu, Qingzhong1
刊名: ASTRONOMICAL JOURNAL
出版日期: 2016-04-01
卷号: 151, 期号:4
关键词: binaries: general ; stars: emission-line, Be ; stars: individual (RX J0440.9+4431) ; X-rays: binaries
DOI: 10.3847/0004-6256/151/4/104
文章类型: Article
英文摘要: existed 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.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: 4U 0115+63/V635 CASSIOPEIAE ; X-RAY ; EMISSION-LINES ; STARS ; VARIABILITY ; DISCOVERY ; OSCILLATIONS ; PHOTOMETRY ; ENVELOPES ; TELESCOPE
收录类别: SCI
项目资助者: 973 Program of China(2013CB837000) ; National Natural Science of China(11273064 ; Strategic Priority Research Program of CAS(XDB09000000) ; Open Project Program of the Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences ; CAS ; People's Government of Yunnan Province ; 11433009 ; 11573071)
语种: 英语
WOS记录号: WOS:000375609100017
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16209
Appears in Collections:宇宙伽马暴、中子星及相关物理研究团组_期刊论文

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作者单位: 1.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
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