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Very Low Frequency QPO in 4U1700-37
stars: individual: 4U1700-37 ñ stars: oscillations ñ X-rays: binaries
2011/9/29
Very low frequency ({\nu} ~ 1.9 mHz) quasi-periodic oscillations (QPO) have been detected in 2 - 60 keV X-rays from 4U1700-37 using auto-correlation function analysis of RXTE archival data. No pulsar ...
中子星X射线双星中kHz QPO现象的理论解释
X射线双星 吸积 中子星 千赫兹准周期振荡(kHz QPO)
2012/9/12
罗西X射线时变探测器(RXTE)在中子星小质量X射线双星中发现了千赫兹准周期振荡现象(kHzQPO)。kHzQPO的频率一般在几百到上千赫兹,其动力学时标与吸积盘最内部区域物质的运动时标一致,因此普遍认为kHz QPO产生于中子星表面附近区域,携带了来自中心中子星及周围强引力场信息,如质量、自转周期、角动量、半径、磁场等。kHz QpO现象的理解为研究强引力场和致密物质状态开启了一扇新的窗口。着重...
Discovery of a QPO in the X-ray pulsar 1A 1118-615: correlated spectral and aperiodic variability
X-rays binaries — pulsars individual 1A 1118-615
2010/11/10
Aims. Our goal is to investigate the X-ray timing and spectral variability of the high-mass X-ray binary 1A 1118-615 during a type-II outburst.