论文标题
Planck SZ中的AGN反馈占空比选择了Chandra观测
AGN feedback duty cycle in Planck SZ selected clusters using Chandra observations
论文作者
论文摘要
我们在普朗克调查中使用其Sunyaev-Zel'Dovich（SZ）签名选择的附近星系簇的档案Chandra观察对X射线腔进行了系统的研究，该群体在Planck调查中提供了签名，该标志提供了几乎没有偏见的质量选择样品，以探索整个AGN反馈占空比。基于X射线图像分析，我们报告说，164个簇中有30个显示X射线腔，这对应于18％的检测部分。在校正空间分辨率以匹配高$ z $ spt-sz样品之后，检测分数降低到9％，与高Z样品一致，这暗示AGN反馈并未在近8个回旋中演变。我们的发现与缺乏冷核簇的进化相符。我们计算腔功率P _ {\ rm cav}，发现我们样品中的大多数系统都具有足够的AGN加热以抵消簇内培养基的辐射损失。
We present a systematic study of X-ray cavities using archival Chandra observations of nearby galaxy clusters selected by their Sunyaev-Zel'dovich (SZ) signature in the Planck survey, which provides a nearly unbiased mass-selected sample to explore the entire AGN feedback duty cycle. Based on X-ray image analysis, we report that 30 of the 164 clusters show X-ray cavities, which corresponds to a detection fraction of 18%. After correcting for spatial resolution to match the high-$z$ SPT-SZ sample, the detection fraction decreases to 9%, consistent with the high-z sample, hinting that the AGN feedback has not evolved across almost 8 Gyrs. Our finding agrees with the lack of evolution of cool-core clusters fraction. We calculate the cavity power, P_{\rm cav}, and find that most systems of our sample have enough AGN heating to offset the radiative losses of the intracluster medium.
