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首页> 外文期刊>The Astrophysical journal >X-RAY EMISSION FROM COLLIDING WIND SHOCKS IN THE WOLF-RAYET BINARY WR 140
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X-RAY EMISSION FROM COLLIDING WIND SHOCKS IN THE WOLF-RAYET BINARY WR 140

机译：WOLF-RAYET BINARY WR 140中碰撞风电的X射线发射

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摘要

We analyze four ASCA X-ray observations of the Wolf-Rayet binary system WR 140 obtained between 1993 and 1997 by making use of hydrodynamic colliding wind (CW) shock models. The analysis shows that the CW shock models are able to accurately reproduce the X-ray spectra at different orbital phases using mass-loss and orbital parameters that are within the ranges allowed by the uncertainties. However, some adjustment in the currently accepted values of the semimajor axis and time of periastron passage may eventually be required. Models that allow for different electron and ion temperatures provide better fits to the data. Extra absorption is inferred from CW shock models above that expected from the winds and interstellar medium, the origin of which is not yet known. We also report the serendipitous discovery of hot plasma at temperatures in excess of ～2 keV and X-ray emission lines in spectra extracted from the diffuse Cygnus superbubble background in the vicinity of WR 140.
机译：我们利用水动力碰撞风（CW）冲击模型分析了1993年至1997年获得的Wolf-Rayet二元系统WR 140的四个ASCA X射线观察结果。分析表明，连续波冲击模型能够使用质量损失和轨道参数（在不确定性允许的范围内）准确地重现不同轨道相位的X射线光谱。但是，最终可能需要对目前接受的半长轴值和围星体通过时间进行一些调整。允许不同电子和离子温度的模型可以更好地拟合数据。从CW冲击模型推断出的额外吸收高于风和星际介质的期望值，其起源尚不清楚。我们还报告了偶然发现的温度超过约2 keV的热等离子体，并且从WR 140附近的弥漫性天鹅座超气泡背景提取的光谱中发现了X射线发射线。

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