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arXiv 1505.07155astro-ph.HE
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从PSR B1259-63/LS 2883双星中喷出的扩展X射线天体

An extended X-ray object ejected from the PSR B1259-63/LS 2883 binary

George G. Pavlov, Jeremy Hare, Oleg Kargaltsev, Blagoy Rangelov, Martin Durant

摘要:

本文分析了Chandra X射线天文台对偏心γ射线双星PSR B 1259 -63/LS 2883的观测结果。分析表明,在以前的观测中看到的扩展X射线特征仍在以约0.07 c的平均投影速度远离双星,并显示出加速的迹象。该特征的光谱似乎是硬的(光子指数为0.8),与先前测量的值相比没有软化的迹象。我们将其解释为脉冲星通过与O星的衰变盘相互作用从双星中喷出的等离子体团。我们认为团簇是在未受冲击的相对论脉冲星风中运动的,脉冲星风可以加速团簇。其X射线发射可以解释为PW与团块碰撞产生的同步辐射。

英文摘要:

We present the analysis of the Chandra X-ray Observatory observations of the eccentric gamma-ray binary PSR B1259-63/LS 2883. The analysis shows that the extended X-ray feature seen in previous observations is still moving away from the binary with an average projected velocity of about 0.07c and shows a hint of acceleration. The spectrum of the feature appears to be hard (photon index of 0.8) with no sign of softening compared to previously measured values. We interpret it as a clump of plasma ejected from the binary through the interaction of the pulsar with the decretion disk of the O-star around periastron passage. We suggest that the clump is moving in the unshocked relativistic pulsar wind (PW), which can accelerate the clump. Its X-ray emission can be interpreted as synchrotron radiation of the PW shocked by the collision with the clump.

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