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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Abundance inhomogeneity in the northeastern rim of the Cygnus Loop revealed by the Suzaku observatory
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Abundance inhomogeneity in the northeastern rim of the Cygnus Loop revealed by the Suzaku observatory

机译：朱雀天文台揭示天鹅座环东北缘的丰度不均匀性

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摘要

We present the results of a spatially resolved spectral analysis from four Suzaku observations covering the northeastern rim of the Cygnus Loop. A two-kT(e) non-ionization equilibrium (NEI) model fairly well represents our data, which confirms the NEI condition of the plasma there. The metal abundances are depleted relative to the solar values almost everywhere in our field of view. We find abundance inhomogeneities across the field: the northernmost region (Region A) has enhanced absolute abundances compared with other regions. In addition, the relative abundances of Mg/O and Fe/O in Region A are lower than the solar values, while those in the other regions are twice higher than the solar values. As far as we are concerned, neither a circumstellar medium, fragments of ejecta, nor abundance inhomogeneities of the local interstellar medium around the Cygnus Loop can explain the relatively enhanced abundance in Region A. This point is left as an open question for future work.
机译：我们介绍了来自四个朱雀观测的空间分辨光谱分析的结果，这些观测涵盖了天鹅绒环的东北缘。两kT（e）非电离平衡（NEI）模型很好地代表了我们的数据，这证实了那里血浆的NEI条件。在我们的视野中，几乎每个地方的金属丰度都相对于太阳值而言已经耗尽。我们发现整个油田的丰度不均一：与其他地区相比，最北端的区域（A区）的绝对丰度更高。此外，区域A中Mg / O和Fe / O的相对丰度低于太阳值，而其他区域中的Mg / O和Fe / O的相对丰度则比太阳值高两倍。就我们而言，天鹅座环周围的星际介质，射出物的碎片或本地星际介质的丰度不均匀性都不能解释A区相对丰度的提高。这一点尚待进一步研究。

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