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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Suzaku Spectroscopy of Extended X-Ray Emission in M 17
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Suzaku Spectroscopy of Extended X-Ray Emission in M 17

机译：M 17中扩展X射线发射的朱雀光谱

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摘要

We present the results of a Suzaku spectroscopic study of soft extended X-ray emission in the H ii region of M 17.The spectrum of the extended emission was obtained with a high signal-to-noise ratio in a spatially resolved mannerusing the X-ray Imaging Spectrometer (XIS). We established that contamination by unresolved point sources, theGalactic Ridge X-ray emission, the cosmic X-ray background, and the local hot bubble emission is negligible inthe background-subtracted XIS spectrum of the diffuse emission. Half a dozen emission lines were clearly resolvedfor the first time, including Kα lines of highly ionized O, Ne, and Mg as well as L-series complex of Fe at 0.5-1.5 keV. Based on diagnosis of these lines, we obtained the following results: (1) the extended emission is anoptically thin thermal plasma, represented well by a single temperature of ~ 3.0 ± 0.4 MK, (2) the abundances ofelements with emission lines in the diffuse spectrum are 0.1-0.3 solar, while those of bright discrete sources are0.3-1.5 solar, (3) the metal abundances relative to each other in the diffuse emission are consistent with solar, exceptfor a Ne enhancement of a factor of~ 2, (4) both the plasma temperature and the chemical composition of the diffuseemission show no spatial variation across the studied spatial scale of ~ 5 pc.
机译：我们展示了M 17的H ii区中软扩展X射线发射的朱雀光谱研究的结果。使用X-射线在空间上解析的方式以高信噪比获得了扩展发射的光谱射线成像光谱仪（XIS）。我们确定，在扣除背景的XIS光谱中，由未解决的点源，银河岭X射线发射，宇宙X射线背景和局部热气泡发射造成的污染可以忽略不计。首次明确解析了六种发射线，包括高电离的O，Ne和Mg的Kα线以及0.5-1.5 keV的Fe的L系列配合物。基于这些线的诊断，我们获得了以下结果：（1）扩展的发射是光学上较薄的热等离子体，由〜3.0±0.4 MK的单个温度很好地表示，（2）扩散中发射线的元素丰度光谱是0.1-0.3太阳，而明亮的离散光源的光谱是0.3-1.5太阳，（3）扩散发射中相对于彼此的金属丰度与太阳一致，但Ne的增强系数约为2， （4）在〜5 pc的研究空间范围内，等离子体温度和扩散发射的化学成分均未显示空间变化。

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