The 6.7-keV iron-line emission in the Galactic Centre

The 6.7-keV iron-line emission in the Galactic Centre
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银河系中心的 6.7 keV 铁线发射

DOI:
10.1088/1742-6596/54/1/018
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发表时间:
2006
期刊:
arXiv: Astrophysics
影响因子:
--
通讯作者:
A. Decourchelle
A. Decourchelle
中科院分区:
--
文献类型:
--
作者:
Robert S. Warwick;M. Sakano;A. Decourchelle

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我们使用最近的XMM-牛顿观测研究银河系中心区域看到的“弥漫”X射线发射。从光谱上看,辐射可以分为三个主要部分,每个部分都有一条突出的光谱线。使用这些线作为示踪剂,我们调查的各种组件的基本空间分布。具体来说,我们发现类氦铁的6.7 keV谱线具有相对平滑的圆对称分布,以Sgr A* 为中心,表面亮度在r = 3' − 12'范围内随着半径r−0.87±0.06而福尔斯。这反映了底层恒星人口的分布,并为6.7 keV线和相关的硬热连续谱(kT ≤ 8 keV)起源于微弱点源的总发射的假设提供了强有力的支持。
We use recent XMM-Newton observations to study the ''diffuse'' X-ray emission seen in the Galactic Centre Region. Spectrally, the emission can be separated into three major components, each characterised by a prominent spectral line. Using these lines as tracers, we investigate the underlying spatial distribution of the various components. Specifbally, we find the 6.7-keV line of helium-like iron, has a relatively smooth, circularly symmetric distribution centred on Sgr A* and a surface brightness which falls off with radius as r−0.87±0.06 over the range r = 3' − 12'. This mirrors the distribution of the underlying stellar population and adds strong support to the hypothesis that the 6.7-keV line and the associated hard thermal continuum (with kT ≈ 8 keV) originates in the summed emission of faint point sources.
DOI: 10.1086/322282
发表时间: 2001-05
期刊: The Astrophysical Journal
影响因子: --
作者:
H. Murakami;K. Koyama;Y. Maeda
通讯作者: H. Murakami;K. Koyama;Y. Maeda
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DOI: --
发表时间: 2005
期刊: Astrophysical Journal 635
影响因子: --
作者:
Ebisawa;K.;Bamba;A.et al.
通讯作者: A.et al.