Testing Emergent Gravity with Optical, X-Ray, and Weak Lensing Measurements in Massive, Relaxed Galaxy Clusters
Testing Emergent Gravity with Optical, X-Ray, and Weak Lensing Measurements in Massive, Relaxed Galaxy Clusters
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通过光学、X 射线和弱透镜测量在巨大、松弛的星系团中测试新兴重力
DOI：
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发表时间：
2019
影响因子：
4.9
通讯作者：
Jacob R. Sims
中科院分区：
文献类型：
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作者：
J. Zuhone;Jacob R. Sims
我们测试的预测紧急重力（EG）使用物质密度的放松，大规模的星系团从光学和X射线波段观察。我们改进了以前的工作在这一领域，包括重子质量贡献的最亮的星系团（BCG）在每个系统中，除了总质量分布从引力透镜和质量分布的X射线发射气体从钱德拉。我们使用这些数据的背景下，EG预测的“表观”暗物质（DM）分布从观察到的重子分布，反之亦然。我们发现，虽然在分析中加入BCG改进了与团簇内部区域（kpc）观测的一致性，但在更大的半径（kpc）处，EG对质量分布和重子质量分数的预测与观测的一致性不超过1/2−6，尽管在半径接近r500处一致性有所改善。至少在它目前的形式，EG似乎没有再现所观察到的特征的放松星系团以及冷DM模型。
We test the predictions of emergent gravity (EG) using matter densities of relaxed, massive clusters of galaxies observed from optical and X-ray wavebands. We improve upon previous work in this area by including the baryon mass contribution of the brightest cluster galaxy (BCG) in each system, in addition to total mass profiles from gravitational lensing and mass profiles of the X-ray emitting gas from Chandra. We use this data in the context of EG to predict the “apparent” dark matter (DM) distribution from the observed baryon distribution, and vice versa. We find that although the inclusion of the BCG in the analysis improves the agreement with observations in the inner regions of the clusters ( kpc), at larger radii ( kpc) the EG predictions for mass profiles and baryon mass fractions are not in agreement with observations by a factor of up to ∼2−6, though the agreement improves at radii near r500. At least in its current form, EG does not appear to reproduce the observed characteristics of relaxed galaxy clusters as well as cold DM models.
用星系团的质量密度测试新兴引力
影响因子：
5
作者：
Halenka, Vitali;Miller, Christopher J.
通讯作者：
Miller, Christopher J.