Deconvolution of ASCA X-ray data — II. Radial temperature and metallicity profiles for 106 galaxy clusters
Deconvolution of ASCA X-ray data — II. Radial temperature and metallicity profiles for 106 galaxy clusters
复制标题
ASCA X 射线数据的反卷积 — II. 106 个星系团的径向温度和金属丰度剖面
DOI：
10.1046/j.1365-8711.2000.03163.x
复制
发表时间：
1999
影响因子：
4.8
通讯作者：
D. White
中科院分区：
文献类型：
--
作者：
D. White
在论文I中，我们提出了一种方法来恢复星系团ASCA X射线卫星观测的星系团内气体的性质的空间变化。我们验证了这个过程的正确性，将其应用到模拟集群数据集，我们受到了各种污染物常见的ASCA数据。在本文中，我们提出的结果，我们得到当我们将这种方法应用到真实的星系团的观测。我们确定了样品中106个簇的宽带温度和冷却流质量沉积速率，并获得了温度、丰度和发射率分布（即，至少两个环形箱）。我们发现，90%的这些温度曲线是一致的等温线在3σ置信水平。这与Markevitch等人从30个星团的样本中发现的急剧下降的星团温度分布的普遍性相冲突。
In Paper I we presented a methodology to recover the spatial variations of properties of the intracluster gas from ASCA X-ray satellite observations of galaxy clusters. We verified the correctness of this procedure by applying it to simulated cluster data sets that we had subjected to the various contaminants common in ASCA data. In this paper we present the results that we obtain when we apply this method to real galaxy cluster observations. We determine broad-band temperature and cooling-flow mass-deposition rates for the 106 clusters in our sample, and obtain temperature, abundance and emissivity profiles (i.e., at least two annular bins) for 98 of these clusters. We find that 90 per cent of these temperature profiles are consistent with isothermality at the 3σ confidence level. This conflicts with the prevalence of steeply declining cluster temperature profiles found by Markevitch et al. from a sample of 30 clusters.