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MULTI-WAVELENGTH STUDY OF THE Be/X-RAY BINARY MXB 0656-072
Yan, Jingzhi1,2; Heras, Juan Antonio Zurita2; Chaty, Sylvain2; Li, Hui1,3; Liu, Qingzhong1,3
2012-07-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume753Issue:1Pages:73(11pp)
AbstractWe present and analyze the optical photometric and spectroscopic data of the Be/X-ray binary MXB 0656-072 from 2006 to 2009. A 101.2 day orbital period is found, for the first time, from the present public X-ray data (Swift/BAT and RXTE/ASM). The anti-correlation between the Ha emission and the UBV brightness of MXB 0656-072 during our 2007 observations indicates that a mass ejection event took place in the system. After the mass ejection, a low-density region might develop around the Oe star. With the outward motion of the circumstellar disk, the outer part of the disk interacted with the neutron star around its periastron passage and a series of X-ray outbursts were triggered between MJD 54350 and MJD 54850. The Proportional Counter Array-HEXTE spectra during the 2007-2008 X-ray outbursts could be well fitted by a cutoff power law with low-energy absorption, together with an iron line around 6.4 keV, and a broad cyclotron resonance feature around 30 keV. The same variability of the soft and hard X-ray colors in 2.3-21 keV indicated that there were no overall changes in the spectral shape during the X-ray outbursts, which might only be connected with the changes of the mass accretion rate onto the neutron star.
KeywordStars: Emission-line, Be Stars: Individual (Mxb 0656-072) Stars: Neutron X-rays: Binaries
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/753/1/73
WOS KeywordTIMING-EXPLORER ; X-PERSEI ; STARS ; VARIABILITY ; CASSIOPEIAE ; ENVELOPES ; CATALOG ; PULSARS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000305632500073
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8089
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, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Paris Diderot, Lab AIM, Serv Astrophys, CEA,DSM,CNRS,IRFU, FR-91191 Gif Sur Yvette, France
3.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Yan, Jingzhi,Heras, Juan Antonio Zurita,Chaty, Sylvain,et al. MULTI-WAVELENGTH STUDY OF THE Be/X-RAY BINARY MXB 0656-072[J]. ASTROPHYSICAL JOURNAL,2012,753(1):73(11pp).
APA Yan, Jingzhi,Heras, Juan Antonio Zurita,Chaty, Sylvain,Li, Hui,&Liu, Qingzhong.(2012).MULTI-WAVELENGTH STUDY OF THE Be/X-RAY BINARY MXB 0656-072.ASTROPHYSICAL JOURNAL,753(1),73(11pp).
MLA Yan, Jingzhi,et al."MULTI-WAVELENGTH STUDY OF THE Be/X-RAY BINARY MXB 0656-072".ASTROPHYSICAL JOURNAL 753.1(2012):73(11pp).
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