论文标题
北黄根附近的星系组和簇的SZ扩展关系
SZ Scaling Relations of Galaxy Groups and Clusters Near the North Ecliptic Pole
论文作者
论文摘要
SZ缩放关系已用于测试大型星系簇的自相似预测，但是对单个星系组的关注很少。我们使用X射线和SZ观测值研究了北黄根附近的星系组和簇的缩放关系。在天空的这一区域是罗萨特（Rosat）和普朗克卫星（Planck Sateltites）达到最深刻的观察，从而允许对较低的质量系统进行研究。我们的样本由62个X射线检测的组和集群组成，涵盖了$ 10^{13.4} M _ {\ odot} <〜M_ {500} <10^{15} M _ {\ odot} $和$ 0.03 \ lyssim z \ sims z \ sillsim sim 0.82 $。我们从未解决的Planck数据中提取总SZ通量，并在$ r_ {500} $内估计SZ通量的分数，假设有两个不同的压力曲线。 SZ缩放关系是使用贝叶斯技术来审查数据的。我们找到了$ 1.73^{+0.19} _ { - 0.18} $的电源定律斜率，对于$ y_ {sz} -m_ {500} $关系，与5/3的自相似预测一致。 The slope of $0.89^{+0.09}_{-0.08}$ for the $Y_{SZ}-L_{X,500}$ relation is in agreement with other observational studies but not the self-similar prediction of 5/4, and the $Y_{SZ}-Y_{X}$ relation lies below the 1:1 relation when the slope is fixed to unity.确定的缩放关系取决于选定的压力曲线，因此需要解决数据以确定AGN反馈的影响。此外，我们在普朗克康普顿地图中发现了许多潜在的群集候选物，这些候选物在我们的X射线样品中未识别出来。
SZ scaling relations have been used to test the self-similar prediction for massive galaxy clusters, but little attention has been given to individual galaxy groups. We investigate the scaling relations of galaxy groups and clusters near the North Ecliptic Pole using X-ray and SZ observations. This region of the sky is where both the ROSAT and Planck satellites achieved their deepest observations, permitting the investigation of lower mass systems. Our sample consists of 62 X-ray detected groups and clusters, spanning a mass range of $10^{13.4}M_{\odot}<~M_{500}<10^{15}M_{\odot}$ and redshifts of $0.03\lesssim z \lesssim 0.82$. We extract the total SZ flux from unresolved Planck data and estimate the fraction of the SZ flux within $R_{500}$ assuming two different pressure profiles. The SZ scaling relations were derived using a Bayesian technique that accounts for censored data. We find a power law slope of $1.73^{+0.19}_{-0.18}$ for the $Y_{SZ}-M_{500}$ relation which is consistent with the self-similar prediction of 5/3. The slope of $0.89^{+0.09}_{-0.08}$ for the $Y_{SZ}-L_{X,500}$ relation is in agreement with other observational studies but not the self-similar prediction of 5/4, and the $Y_{SZ}-Y_{X}$ relation lies below the 1:1 relation when the slope is fixed to unity. The determined scaling relations are dependent on the selected pressure profile, so resolved data are needed to determine the effects of AGN feedback. In addition, we find a number of potential cluster candidates in the Planck Compton maps that were not identified in our X-ray sample.
