论文标题
暗物质光环稀疏性的重力场景的稀疏性
Dark Matter Halo Sparsity of Modified Gravity Scenarios
论文作者
论文摘要
已主张修改的重力（MG）场景来说明宇宙中的暗能量现象。这些模型预测了大型宇宙量表上的一般相对论的出现，这些量子可以通过各种探针进行测试，例如观察星系簇等。在这里，我们调查了MG模型的烙印，这些暗物质光环稀疏性探测的类似簇状光晕的内部质量分布。为此，我们使用标准扁平$λ$ CDM型号的N体模拟Halo目录对Halo稀疏性的性质进行比较分析，并从Destgrain-Pathfinder Simulation Suite套件中进行了MG CDM型号和MG方案。我们发现，筛选机制的发作在整体平均光晕稀疏性的红移演化中留下了独特的特征。由于群集质量上的较大不确定性，目前可用质量估计值的星系簇的稀疏度无法测试MG模型。我们表明，将来应该可以为大型集群样本提供群集质量，确定要高于$ 30 \％$ $的精度水平。
Modified Gravity (MG) scenarios have been advocated to account for the dark energy phenomenon in the universe. These models predict departures from General Relativity on large cosmic scales that can be tested through a variety of probes such as observations of galaxy clusters among others. Here, we investigate the imprint of MG models on the internal mass distribution of cluster-like halos as probed by the dark matter halo sparsity. To this purpose we perform a comparative analysis of the properties of the halo sparsity using N-body simulation halo catalogs of a standard flat $Λ$CDM model and MG scenarios from the DUSTGRAIN-pathfinder simulation suite. We find that the onset of the screening mechanism leaves a distinct signature in the redshift evolution of the ensemble average halos sparsity. Measurements of the sparsity of galaxy clusters from currently available mass estimates are unable to test MG models due to the large uncertainties on the cluster masses. We show that this should be possible in the future provided large cluster samples with cluster masses determined to better than $30\%$ accuracy level.
