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arXiv 1209.0067astro-ph.HE
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朱雀星观测的重元素沿银道面K壳层线分布

The K-shell Line Distribution of Heavy Elements along the Galactic Plane Observed with Suzaku

Hideki Uchiyama, Masayoshi Nobukawa, Takeshi Go Tsuru, Katsuji Koyama

摘要:

本文报道了S、Ar、Ca和Fe的类He和类H离子的K壳层线强度沿银道面的全球分布。从轮廓,我们清楚地分离银河系中心的X射线发射(GCXE)和银河系的山脊的X射线发射(GRXE)。S、Ar、Ca和Fe的类He K $α$线沿银道面的强度分布近似相似,而类H Ly $α$线沿银道面的强度分布不相似。特别是,H-类赖氨酸$α$的S和Fe的配置文件显示出显着的对比度,大量过量的Fe和几乎没有过量的S线相比,GRXE中的GCXE。虽然显著的K壳层线由$\sim$ 1 keV和$\sim$ 7 keV温度等离子体表示,但这两个温度在GCXE和GRXE之间是不相等的。实际上,GCXE和GRXE的光谱分析表明,$\sim$ 1 keV等离子体在GCXE中的温度低于GRXE,而$\sim$ 7 keV等离子体在GCXE中的温度低于GRXE。

英文摘要:

We report the global distribution of the intensities of the K-shell lines from the He-like and H-like ions of S, Ar, Ca and Fe along the Galactic plane. From the profiles, we clearly separate the Galactic center X-ray emission (GCXE) and the Galactic ridge X-ray emission (GRXE). The intensity profiles of the He-like K$α$ lines of S, Ar, Ca and Fe along the Galactic plane are approximately similar with each other, while not for the H-like Ly$α$ lines. In particular, the profiles of H-like Ly$α$ of S and Fe show remarkable contrast; a large excess of Fe and almost no excess of S lines in the GCXE compared to the GRXE. Although the prominent K-shell lines are represented by $\sim$1 keV and $\sim$7 keV temperature plasmas, these two temperatures are not equal between the GCXE and GRXE. In fact, the spectral analysis of the GCXE and GRXE revealed that the $\sim$1 keV plasma in the GCXE has lower temperature than that in the GRXE, and vice versa for the $\sim$7 keV plasma.

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