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arXiv 1301.0618astro-ph.HE
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银河系超新星遗迹W49B可能起源于喷流驱动的核心坍塌爆炸

The Galactic Supernova Remnant W49B Likely Originates from a Jet-Driven, Core-Collapse Explosion

Laura A. Lopez, Enrico Ramirez-Ruiz, Daniel Castro, Sarah Pearson

摘要:

我们目前的结果从220-ks的观测银河超新星遗迹(SNR)W 49 B使用先进的CCD成像光谱仪(ACIS)的Chanrda X射线天文台。我们利用这些数据进行详细的空间分辨光谱分析整个SNR的目的是调查的热力学性质和爆炸起源的W 49 B。我们发现在电子温度和吸收柱朝向W 49 B的实质性变化,我们表明,平均金属丰度与双极/喷气驱动的核心崩溃SNe模型的预测产量是一致的。此外,我们对任何未探测到的点源的X射线光度设置了严格的上限,并且排除了与W 49 B相关的中子星的存在。我们的结论是,W 49 B的形态,光谱和环境特征表明双极型Ib/Ic SN起源,使其成为第一个在银河系中发现的同类。

英文摘要:

We present results from a 220-ks observation of the galactic supernova remnant (SNR) W49B using the Advanced CCD Imaging Spectrometer (ACIS) on board the Chanrda X-ray Observatory. We exploit these data to perform detailed spatially-resolved spectroscopic analyses across the SNR with the aim to investigate the thermodynamic properties and explosive origin of W49B. We find substantial variation in the electron temperature and absorbing column toward W49B, and we show that the mean metal abundances are consistent with the predicted yields in models of bipolar/jet-driven core-collapse SNe. Furthermore, we set strict upper limits on the X-ray luminosity of any undetected point sources, and we exclude the presence of a neutron star associated with W49B. We conclude that the morphological, spectral, and environmental characteristics of W49B are indicative of a bipolar Type Ib/Ic SN origin, making it the first of its kind to be discovered in the Milky Way.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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