4U 1907+09自旋速率的最新测量
Recent Spin Rate Measurements of 4U 1907+09
摘要：
本文利用RXTE对高质量X射线双星脉冲星4U 1907+09进行了X射线光谱和脉冲时序分析。自旋速率的测量表明，一个新的自旋下降的插曲与以前的稳定自旋下降率接近的速度。轨道相位分辨光谱揭示了氢柱密度随轨道的变化，在近星点后达到最大值。还观察到随着光度增加的轻微光谱软化。
英文摘要：
In this study, X-ray spectral and pulse timing analysis of the high mass X-ray binary (HMXB) pulsar 4U 1907+09, based on the observations with RXTE are presented. Spin rate measurements indicate a new spin-down episode with a rate close to the previous steady spin-down rate. Orbital phase resolved spectroscopy reveals that the Hydrogen column density varies through the orbit reaching to its maximum value just after periastron. A slight spectral softening with increasing luminosity is also observed.
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