Systematic versus statistical uncertainties in masses and magnifications of the Hubble Frontier Fields
Systematic versus statistical uncertainties in masses and magnifications of the Hubble Frontier Fields
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DOI：
10.1093/mnras/staa921
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发表时间：
2020-04
影响因子：
4.8
通讯作者：
C. Raney;C. Keeton;S. Brennan;H. Fan
中科院分区：
文献类型：
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作者：
C. Raney;C. Keeton;S. Brennan;H. Fan
哈勃前沿场的数据，沿着由其他望远镜获得的多个数据集，提供了一些迄今为止对星团透镜最广泛的限制。多个透镜建模团队分析了这些领域，并公布了一些可交付成果。通过比较这些结果，我们可以进行一个独特的和重要的测试的状态集群透镜建模。具体来说，我们看到不同的团队可以很好地复制类似的放大倍率和质量分布。我们发现，在距离星团核心1弧分的距离处，磁场的圆形平均质量分布受到显著约束（散射<5%），但放大率可以显著变化。在6个视野中取平均值，我们发现在适度放大3（10）倍时，偏倚为-6%（-17%），分散度为~40%（~65%）。个别团队报告的统计误差往往显着小于所有团队之间的差异，表明继续在集群透镜系统学研究的重要性。
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.