Constraining warm dark matter with cosmic shear power spectra
Constraining warm dark matter with cosmic shear power spectra
复制标题
用宇宙剪切功率谱约束暖暗物质
DOI：
10.1088/1475-7516/2011/01/022
复制
发表时间：
2010
影响因子：
6.4
通讯作者：
J. Weller
中科院分区：
文献类型：
--
作者：
K. Markovivc;S. Bridle;A. Slosar;J. Weller
我们研究了宇宙剪切对暗物质粒子质量的潜在制约，假设所有暗物质都是由轻热遗迹粒子组成的。考虑到在这样的热暗物质场景中进行宇宙学预测所涉及的理论不确定性，我们使用线性热暗物质功率谱的解析拟合，并比较(I)使用从这些线性功率谱估计的质量函数的晕模型和(Ii)线性功率谱的非线性演化的解析拟合。我们乐观地忽略了重子对这项工作的竞争效应。我们发现与方法(I)相比，方法(II)是保守的。我们使用这些方法来评估宇宙学的约束，超越了其他四个宇宙学参数。使用更保守的方法，我们发现类欧几里德弱透镜测量加上普朗克宇宙微波背景任务初级各向异性的约束，可以获得2.5keV的粒子质量下限。
We investigate potential constraints from cosmic shear on the dark matter particle mass, assuming all dark matter is made up of light thermal relic particles. Given the theoretical uncertainties involved in making cosmological predictions in such warm dark matter scenarios we use analytical fits to linear warm dark matter power spectra and compare (i) the halo model using a mass function evaluated from these linear power spectra and (ii) an analytical fit to the non-linear evolution of the linear power spectra. We optimistically ignore the competing effect of baryons for this work. We find approach (ii) to be conservative compared to approach (i). We evaluate cosmological constraints using these methods, marginalising over four other cosmological parameters. Using the more conservative method we find that a Euclid-like weak lensing survey together with constraints from the Planck cosmic microwave background mission primary anisotropies could achieve a lower limit on the particle mass of 2.5 keV.
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.