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Is the Cygnus superbubble a hypernova remnant?

机译:天鹅座超气泡是超新星残留吗?

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We present here an observation of the Cygnus Superbubble (CSB) using the Solid-state slit camera (SSC) aboard the Monitor of All-sky X-ray Image (MAXI). The CSB is a large diffuse structure in the Cygnus region with enhanced soft X-ray emission. By utilizing the CCD spectral resolution of the SSC, we detected Fe, Ne, Mg emission lines from the CSB for the first time. The best-fit model implies a thin hot plasma of kT ≈ 0.3 keV with a depleted abundance of 0.26±0.1 solar. Joint spectrum fittings of the ROSAT/PSPC data and MAXI/SSC data enabled us to measure precise values of N_H and the temperature inside the CSB. The results show that all of the regions in the CSB have a similar NH and temperature, indicating that the CSB is a single unity. An energy budgets calculation suggests that (2-3) × 10 ~6 yr of stellar wind from the Cyg OB2 is sufficient to power up the CSB, whereas due to its off-center position, the origin of the CSB is most likely to be a Hypernova.
机译:我们在这里展示了使用全开式X射线图像监视器(MAXI)上的固态裂隙相机(SSC)对天鹅座超级气泡(CSB)的观察。 CSB是在天鹅座区域的大型扩散结构,具有增强的软X射线发射。通过利用SSC的CCD光谱分辨率,我们首次检测到CSB的Fe,Ne,Mg发射线。最佳拟合模型意味着kT≈0.3 keV的薄热等离子体,耗尽的太阳丰度为0.26±0.1太阳。 ROSAT / PSPC数据和MAXI / SSC数据的联合频谱拟合使我们能够测量N_H和CSB内部温度的精确值。结果表明,CSB中的所有区域都具有相似的NH和温度,这表明CSB是一个整体。能源预算计算表明,来自Cyg OB2的(2-3)×10〜6年恒星风足以为CSB供电,而由于其偏心位置,CSB的起源很可能是超新星。

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