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arXiv 1004.3515astro-ph.HE
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XMM-牛顿和朱雀探测脉冲星风星云G54 .1+0.3周围的X射线发射壳

XMM-Newton and Suzaku detection of an X-ray emitting shell around the pulsar wind nebula G54.1+0.3

F. Bocchino, R. Bandiera, J. Gelfand

摘要:

最近的X射线观测已被证明是非常有效的检测以前未知的超新星遗迹壳周围的脉冲星风星云(PWNe),在这些情况下,壳的特征提供了进一步的线索嵌入PWN的演化阶段。然而,目前尚不清楚为什么一些PWNe仍然是“裸体”。我们进行了一次X射线观测活动,目标是PWN G54.1+0.3,螃蟹的“近亲”,目的是检测相关的SNR壳。分析了XMM-Newton和Suzaku对G54.1+0.3的观测结果,模拟了尘埃散射晕的贡献。我们检测到一个固有的微弱的弥漫X射线发射周围的硬光谱,这可以建模与幂律(伽马= 2.9)或热等离子体模型(kT=2.0千电子伏)。如果壳层是热的,我们得到爆炸能量E=0.5- 1.6 × 10^51尔格,冲击前ISM密度为0.2 cm^-3,年龄约为2000年。利用这些结果在PWN-SNR演化的MHD模型中,我们得到了一个很好的一致性之间的预测和观察到的位置的外壳和PWN冲击。

英文摘要:

Recent X-ray observations have proved to be very effective in detecting previously unknown supernova remnant shells around pulsar wind nebulae (PWNe), and in these cases the characteristics of the shell provide further clues on the evolutionary stage of the embedded PWN. However, it is not clear why some PWNe are still "naked". We carried out an X-ray observational campaign targeted at the PWN G54.1+0.3, the "close cousin" of the Crab, with the aim to detect the associated SNR shell. We analyzed an XMM-Newton and Suzaku observations of G54.1+0.3 and we model out the contribution of dust scattering halo. We detected an intrinsic faint diffuse X-ray emission surrounding a hard spectrum, which can be modeled either with a power-law (gamma= 2.9) or with a thermal plasma model (kT=2.0 keV.). If the shell is thermal, we derive an explosion energy E=0.5-1.6x10^51 erg, a pre-shock ISM density of 0.2 cm^-3 and an age of about 2000 yr. Using these results in the MHD model of PWN-SNR evolution, we obtain an excellent agreement between the predicted and observed location of the shell and PWN shock.

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