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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Suzaku Observation of the Ophiuchus Galaxy Cluster:One of the Hottest Cool Core Clusters
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Suzaku Observation of the Ophiuchus Galaxy Cluster:One of the Hottest Cool Core Clusters

机译：朱雀对蛇夫星系星团的观测：最热的酷核心星团之一

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摘要

We present the analysis of a Suzaku observation of the Ophiuchus galaxy cluster. We confirmed that the cluster has a cool core. While the temperature of the intracluster medium (ICM) decreases toward the center, the metal abundance increases. Except for the core (r ≤50 kpc), the cluster is hot 9-10 keV) and is almost isothermal for r ≤ 1 Mpc; the latter contradicts a previous study. We do not detect any variation of the redshift of the ICM in the cluster; the upper limit of the velocity difference is 3000 km s~(-1) . The iron-line ratios in X-ray spectra indicate that the ICM has reached the ionization equilibrium state. From these results, we conclude that the Ophiuchus cluster is not a major merger cluster, but one of the hottest clusters with a cool core. We obtain the upper limit of non-thermal emission from the cluster, which is consistent with both the recent claimed detection with INTEGRAL and the recent upper limits with the Swift/BAT. If the cluster has bright non-thermal emission, as suggested by the INTEGRAL measurement, it is probably not due to a recent major cluster merger.
机译：我们提出了对蛇夫座星云团的朱雀观测的分析。我们确认集群具有很酷的核心。当集群内介质（ICM）的温度朝中心降低时，金属丰度增加。除核心（r≤50 kpc）外，团簇的温度为9-10 keV，当r≤1 Mpc时，团簇几乎是等温的。后者与先前的研究相矛盾。我们没有检测到集群中ICM的红移的任何变化;速度差的上限为3000 km s〜（-1）。 X射线光谱中的铁线比表明ICM已达到电离平衡状态。从这些结果可以得出结论，蛇夫座集群不是主要的合并集群，而是核心最酷的最热门集群之一。我们从群集中获得了非热辐射的上限，这与最近使用INTEGRAL声称的检测以及最近使用Swift / BAT的检测上限是一致的。根据INTEGRAL测量结果，如果该群集具有明亮的非热辐射，则可能不是由于最近的大型群集合并所致。

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