Elemental Abundances in Supernova Remnant W49B as Clues to Its Progenitor
Elemental Abundances in Supernova Remnant W49B as Clues to Its Progenitor
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DOI：
10.3847/2515-5172/abac07
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发表时间：
2020-08
期刊：
影响因子：
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通讯作者：
Jared E Siegel;V. Dwarkadas;K. Frank;D. Burrows
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文献类型：
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作者：
Jared E Siegel;V. Dwarkadas;K. Frank;D. Burrows
我们应用平滑粒子推断（SPI）技术分析了信噪比W49B的x射线发射。在x射线中，它是一个中心充满的超新星遗迹，最近被认为是第一个有等离子体过度电离的遗迹之一。利用SPI，我们推断出等离子体的密度结构，并推导出等离子体中各个元素的质量。我们将用SPI推断出的丰度与从广泛的超新星爆炸模型中获得的丰度进行了比较，包括Ia型和核心坍缩，以及能量和偏离中心的变体。包含某种形式的爆炸的Ia型模型被发现是最相容的，而纯爆燃模型和所有的核心坍缩模型被发现是不相容的。
We apply the Smoothed Particle Inference (SPI) technique to analyze the X-ray emission from SNR W49B. In X-rays, it is visible as a centrally filled supernova remnant, and was recently recognized as one of the first remnants to have plasma that is overionized. Using SPI we infer the density structure and derive the mass of individual elements in the plasma over the entire remnant. We have compared the abundances inferred with SPI to those obtained from a wide range of supernova explosion models, including both Type Ia and core-collapse, as well as energetic and off-center variants. Type Ia models that incorporate some form of detonation are found to be the most compatible, while pure deflagration models, and all core-collapse models, are found to be incompatible.