Recovery of the orbital parameters and pulse evolution of V0332+53 during a huge outburst
Zhang S(张澍); Qu JL(屈进禄); Song LM(宋黎明); Zhang, S; Qu, JL; Song, LM; Torres, DF
刊名ASTROPHYSICAL JOURNAL
2005
卷号630期号:1页码:L65-L68
关键词stars : individual (V0332+53) X-rays : binaries
学科分类Astronomy & Astrophysics
DOI10.1086/462415
通讯作者Inst High Energy Phys, Lab Particle Astrophys, Beijing 100049, Peoples R China ; Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA
文章类型Article
英文摘要The high- mass X-ray binary V0332+53 became active at the end of 2004, and the outburst was observed in hard X-rays by RXTE and INTEGRAL. Based on these hard X-ray observations, we measure the orbital parameters by fitting the Doppler-shifted spin periods. The derived orbital period and eccentricity are consistent with those obtained by Stella et al. from EXOSAT observations, whereas the projected semimajor axis and the periastron longitude are found to have changed from 48 +/- 4 to 86(-10)(+6) lt-s and from 313 degrees +/- 10 to 283 degrees +/- 14 degrees, respectively. This would indicate an angular speed of =1 degrees.5 +/- 0 degrees.8 yr(-1) for the rotation of the orbit over the past 21 years. The periastron passage time of MJD 53,367 +/- 1 is just around the time when the intensity reached maximum, and an orbital period earlier is the time when the outburst started. This correlation resembles the behavior of a type I outburst. During outburst, the source spun up at a rate of 8.01(-1.14)(+1.00) s day(-1). The evolution of the pulse profile is highly intensity dependent. The separation of double pulses remained almost constant (similar to 0.47) when the source was bright and dropped to 0.37 within 3 days as the source became weaker. The pulse evolution of V0332+53 may be correlated with a change in dominance of the emission between fan-beam and pencil-beam mechanisms.
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS记录号WOS:000231440000017
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240287
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
作者单位中国科学院高能物理研究所
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Zhang S,Qu JL,Song LM,et al. Recovery of the orbital parameters and pulse evolution of V0332+53 during a huge outburst[J]. ASTROPHYSICAL JOURNAL,2005,630(1):L65-L68.
APA 张澍.,屈进禄.,宋黎明.,Zhang, S.,Qu, JL.,...&Torres, DF.(2005).Recovery of the orbital parameters and pulse evolution of V0332+53 during a huge outburst.ASTROPHYSICAL JOURNAL,630(1),L65-L68.
MLA 张澍,et al."Recovery of the orbital parameters and pulse evolution of V0332+53 during a huge outburst".ASTROPHYSICAL JOURNAL 630.1(2005):L65-L68.
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