GALAXY CLUSTERS IN THE SWIFT/BURST ALERT TELESCOPE ERA: HARD X-RAYS IN THE INTRACLUSTER MEDIUM
GALAXY CLUSTERS IN THE SWIFT/BURST ALERT TELESCOPE ERA: HARD X-RAYS IN THE INTRACLUSTER MEDIUM
复制标题
快速/爆发警报望远镜时代的星系团：星系团内介质中的硬 X 射线
DOI：
10.1088/0004-637x/690/1/367
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
A. Moretti
中科院分区：
文献类型：
--
作者：
M. Ajello;P. Rebusco;N. Cappelluti;O. Reimer;H. Böhringer;Jochen Greiner;N. Gehrels;J. Tueller;A. Moretti
我们报告在正在进行的雨燕/爆发警报望远镜（BAT）全天巡天中发现了10个星系团。这个主要由合并星团组成的样本是在15-55 keV波段偶然发现的。我们使用BAT样品来研究热发射上方存在多余的硬x射线。BAT簇不显示显著的（例如，大于或小于2σ）非热硬x射线发射。唯一的例外是英仙座，它的高能辐射可能来自NGC 1275。利用XMM-Newton， Swift/XRT，钱德拉和BAT数据，我们能够得出逆康普顿（IC）发射机制的上限，这与之前声称的大多数硬x射线过量不一致。IC机制的x射线上限与射电数据的耦合表明，在一些团簇中，磁场可能大于0.5 μG。我们还推导了15kev以上星系团的第一个log N-log S和光度函数分布。
We report the detection of 10 clusters of galaxies in the ongoing Swift/Burst Alert Telescope (BAT) all-sky survey. This sample, which mostly comprises merging clusters, was serendipitously detected in the 15–55 keV band. We use the BAT sample to investigate the presence of excess hard X-rays above the thermal emission. The BAT clusters do not show significant (e.g., ⩾2σ) nonthermal hard X-ray emission. The only exception is represented by Perseus whose high-energy emission is likely due to NGC 1275. Using XMM-Newton, Swift/XRT, Chandra and BAT data, we are able to produce upper limits of the inverse Compton (IC) emission mechanism which are in disagreement with most of the previously-claimed hard X-ray excesses. The coupling of the X-ray upper limits of the IC mechanism to radio data shows that, in some clusters, the magnetic field might be larger than 0.5 μG. We also derive the first log N–log S and luminosity function distributions of galaxy clusters above 15 keV.
影响因子：
6.5
作者：
S. Sazonov;M. Revnivtsev;R. Krivonos;E. Churazov;R. Sunyaev
通讯作者：
S. Sazonov;M. Revnivtsev;R. Krivonos;E. Churazov;R. Sunyaev