论文标题
Galaxy集群Zwicky 3146郊区的超模预测
SuperModel Predictions in the Outskirts of the Galaxy Cluster Zwicky 3146
论文作者
论文摘要
自2009年以来已经对许多群集进行了测试的工具，分析了松弛的星系群Zwicky 3146。特别是，该分析的重点是XMM-Newton测得的簇内培养基X射线温度数据，最高为R_ {500}。先前的分析是基于源自Sunyaev-Zeldovich效应压力数据的温度曲线。气体质量分数f_ {vas}是从推断到病毒半径R的所得超模温度曲线中获得的，事实证明，这与苏扎库观察到的陡峭温度剖面一致，并从XMM-Newton观察到的气体密度曲线。 f_ {gas}与通用值之间的比较表明在集群郊区的非热压力组件p_ {nth}。超模分析显示了P_ {nth}的比率α（R）（R）（R）（r）（约50％）与总压力大于模拟所发现的值，突出了气体密度曲线中可能存在积聚子结构和不均匀性的存在。一旦纠正了块状，p_ {nth}的水平将大大降低。但是，在银河系Zwicky 3146的郊区，仍然存在明显的湍流（约20％的α（R））和熵变平。
The relaxed galaxy cluster Zwicky 3146 is analyzed via the SuperModel, a tool already tested on many clusters since 2009. In particular, this analysis is focused on the intracluster medium X-ray temperature data measured by XMM-Newton up to r_{500}. A previous analysis was based on the temperature profile derived from the Sunyaev-Zeldovich effect pressure data. The gas mass fraction f_{gas} is obtained from the resulting SuperModel temperature profile extrapolated up to the virial radius R, that turns out in agreement with the steep temperature profiles observed by Suzaku, and from the gas density profile observed by XMM-Newton. The comparison between f_{gas} with the universal value indicates a non-thermal pressure component, p_{nth}, in the cluster outskirts. The SuperModel analysis shows a ratio alpha(R) (about 50%) of p_{nth} to the total pressure greater than the values found by simulations, highlighting the possible presence of accreting substructures and inhomogeneities in the gas density profile. Once that this profile is corrected for clumpiness, the level of p_{nth} is considerably reduced. However, a significant turbulence (alpha(R) about 20%) and entropy flattening are still present in the outskirts of the galaxy cluster Zwicky 3146.
