论文标题
群众的系统与统计不确定性和哈勃前沿场
Systematic vs. Statistical Uncertainties in Masses and Magnifications of the Hubble Frontier Fields
论文作者
论文摘要
Hubble Frontier字段数据以及其他望远镜获得的多个数据集为迄今为止的群集镜头提供了一些最广泛的约束。多个镜头建模团队分析了这些领域，并使公开了许多可交付成果。通过比较这些结果，我们可以对群集镜头建模状态进行独特而重要的测试。具体而言，我们看到不同团队可以重现相似的宏伟和质量概况的效果。我们发现，在距离簇核的距离距离处，磁场的圆形平均质量谱受到极大的约束（散射<5％），但是增强率可能会有很大的变化。在整个六个字段中平均，我们发现偏差为-6％（-17％），散布〜40％（〜65％）的偏差为3（10）。单个团队报告的统计错误通常比所有团队之间的差异都大得多，这表明持续系统研究在群集镜头中的重要性。
The Hubble Frontier Fields data, along with multiple data sets obtained by other telescopes, have provided some of the most extensive constraints on cluster lenses to date. Multiple lens modeling teams analyzed the fields and made public a number of deliverables. By comparing these results, we can then undertake a unique and vital test of the state of cluster lens modeling. Specifically, we see how well the different teams can reproduce similar magnifications and mass profiles. We find that the circularly averaged mass profiles of the fields are remarkably constrained (scatter <5%) at distances of 1 arcmin from the cluster core, yet magnifications can vary significantly. Averaged across the six fields, we find a bias of -6% (-17%) and a scatter of ~40% (~65%) at a modest magnification of 3 (10). Statistical errors reported by individual teams are often significantly smaller than the differences among all the teams, indicating the importance of continued systematics studies in cluster lensing.
