High resolution soft X-ray spectroscopy of M 87 with the reflection grating spectrometers on XMM-Newton
High resolution soft X-ray spectroscopy of M 87 with the reflection grating spectrometers on XMM-Newton
复制标题
使用 XMM-Newton 上的反射光栅光谱仪对 M 87 进行高分辨率软 X 射线光谱分析
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
D. Worrall
中科院分区：
文献类型：
--
作者：
I. Sakelliou;J. Peterson;T. Tamura;F. Paerels;J. Kaastra;E. Belsole;H. Böhringer;G. Branduardi‐Raymont;C. Ferrigno;J. Herder;J. Kennea;R. Mushotzky;W. T. Vestrand;D. Worrall
我们提出了高分辨率的X射线光谱观测M87的反射光栅光谱仪上XMM-牛顿。我们探测到N、O、Ne、Mg的强K壳层发射，类氦硅的部分发射，一组完全分辨的Fe L壳层发射谱，以及C的部分发射。强发射谱线的角强度分布可检测地分辨在尺度$（15{-}160）arcsec$上。在M 87的内弧的气体具有多相结构，所示的相似性的发射线轮廓的Fe L壳层离子与广泛分离的电离势。在$kT_{
m e} sim 1.8$ keV，以及具有适合于等压冷却流的温度分布但具有$kT_{
m min}约为600$ eV。该冷却流分量的行为在性质上类似于在其他冷却流簇中所看到的。最后，我们没有发现任何强有力的证据，由于共振散射再分配的核心内弧分钟的丰度的空间变化。
We present high-resolution X-ray spectroscopic observations of M 87 with the Reflection Grating Spectrometers on XMM-Newton . We detect strong K-shell line emission from N, O, Ne, Mg, some emission from He-like Si, a fully resolved set of Fe L-shell emission spectra, and some emission from C. The angular intensity distributions of the strong emission lines are detectably resolved on scales $(15{-}160) arcsec$. The gas in the inner arcmin of M 87 has a multi-phase structure, as indicated by the similarity of the emission line profiles of Fe L shell ions with widely separated ionization potentials. The global Fe L spectrum is approximately consistent with an isothermal plasma at $kT_{
m e} sim 1.8$ keV, in addition to a component with a temperature distribution appropriate to an isobaric cooling flow, but with a minimum temperature cutoff of $kT_{
m min} approx 600$ eV. The behaviour of this cooling-flow component is qualitatively similar to what is seen in other cooling flow clusters. Finally, we do not find any strong evidence for a spatial variation in abundances due to resonance scattering redistribution in the inner arcminute of the core.