论文标题
出现的重力无法解释来自SDSS DR7的颜色依赖性星系 - 半镜头镜头信号
Emergent gravity fails to explain color-dependent galaxy-galaxy lensing signals from SDSS Dr7
论文作者
论文摘要
我们使用基于SDSS DR7数据的Galaxy-Galaxy镜头技术测试了新兴的重力（例如）理论。在EG方案中，我们不会期望类似于EG预测的“明显暗物质”中星系样品的颜色依赖性，EG仅由Baryonic质量施加。如果Baryonic质量相似，则根据EG的颜色，来自重型质量的预测透镜谱应相似。我们将星系的恒星质量用作其Baryonic质量的代理。我们将我们的星系样品分为5个恒星质量垃圾箱，并将它们进一步分为每个恒星质量箱中的红色和蓝色子样本。如果我们将光晕质量和浓度设置为自由参数，则数据对$λ$ CDM受到$λ$ CDM的青睐，而$χ^2 $，而EG无法解释Galaxy-Galaxy镜头测量的ESD的颜色依赖性。
We test the Emergent Gravity(EG) theory using the galaxy-galaxy lensing technique based on SDSS DR7 data. In the EG scenario, we do not expect color dependence of the galaxy sample in the 'apparent dark matter' predicted by EG, which is exerted only by the baryonic mass. If the baryonic mass is similar, then the predicted lensing profiles from the baryonic mass should be similar according to the EG, regardless of the color of the galaxy sample. We use the stellar mass of the galaxy as a proxy of its baryonic mass. We divide our galaxy sample into 5 stellar mass bins, and further classify them as red and blue subsamples in each stellar mass bin. If we set halo mass and concentration as free parameters, $Λ$CDM is favored by our data in terms of the reduced $χ^2$ while EG fails to explain the color dependence of ESDs from the galaxy-galaxy lensing measurement.
