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arXiv 0810.0317astro-ph
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用朱雀卫星观测的银河系山脊铁发射线

Iron Emission Lines on the Galactic Ridge Observed with Suzaku

Shigeo Yamauchi, Ken Ebisawa, Yasuo Tanaka, Katsuji Koyama, Hironori Matsumoto, Noriko Y. Yamasaki, Hiromitsu Takahashi, Yuichiro Ezoe

摘要:

为了阐明银河脊X射线发射的起源,我们分析了朱雀星沿银道面不同区域的观测数据,并研究了它们的Fe-K发射线特征。Suzaku将Fe线复合物分解为~6.4 keV、~6.7 keV和~6.97 keV的三条窄线,分别是中性(或低电离)、类He和类H铁离子的K线。6.7 keV谱线在所有观测区域都清晰可见,其纵向分布与以往观测结果一致。在不同的银道面区域(b~0)也发现了6.4keV的发射线。研究了银道面与银道中心区6.4keV/6.7keV和6.97keV/6.7keV谱线通量比的差异,并讨论了其意义。

英文摘要:

In order to elucidate origin of the Galactic Ridge X-ray Emission, we analyzed Suzaku data taken at various regions along the Galactic plane and studied their Fe-K emission line features. Suzaku resolved the Fe line complex into three narrow lines at ~6.4 keV,~6.7 keV and ~6.97 keV, which are K-lines from neutral (or low-ionized), He-like, and H-like iron ions, respectively. The 6.7 keV line is clearly seen in all the observed regions and its longitudinal distribution is consistent with that determined from previous observations. The 6.4 keV emission line was also found in various Galactic plane regions (b~0). Differences in flux ratios of the 6.4 keV/6.7 keV and 6.97 keV/6.7 keV lines between the Galactic plane and the Galactic center regions are studied and its implication is discussed.

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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