用簇数计数探测原始功率谱
Probing the Primordial Power Spectrum with Cluster Number Counts
摘要：
我们调查如何以及星系团数计数可以约束的原始功率谱。在宇宙微波背景（CMB）中的主要各向异性的测量可能会受到限制，由于次级源的前景的存在，探测波数小于约0.30 h Mpc^{-1}的原始功率谱。我们将原始功率谱分解为多个节点，并在每个节点之间进行线性插值。这使我们能够表明，簇数计数可以将原始功率谱形式的约束扩展到约0.45 h Mpc^{-1}的波数。我们估计普朗克和SPT的主要CMB和各自的SZ调查的约束组合。我们发现，他们的约束能力是有限的质量标度关系的不确定性。我们还估计了从SNAP像引力透镜调查检测到的集群的约束。由于在透镜观测的过滤切变和星系团质量之间存在明确而简单的关系，因此在这种情况下，有可能对原始功率谱进行更严格的约束。
英文摘要：
We investigate how well galaxy cluster number counts can constrain the primordial power spectrum. Measurements of the primary anisotropies in the cosmic microwave background (CMB) may be limited, by the presence of foregrounds from secondary sources, to probing the primordial power spectrum at wave numbers less than about 0.30 h Mpc^{-1}. We break up the primordial power spectrum into a number of nodes and interpolate linearly between each node. This allows us to show that cluster number counts could then extend the constraints on the form of the primordial power spectrum up to wave numbers of about 0.45 h Mpc^{-1}. We estimate combinations of constraints from PLANCK and SPT primary CMB and their respective SZ surveys. We find that their constraining ability is limited by uncertainties in the mass scaling relations. We also estimate the constraint from clusters detected from a SNAP like gravitational lensing survey. As there is an unambiguous and simple relationship between the filtered shear of the lensing survey and the cluster mass, it may be possible to obtain much tighter constraints on the primordial power spectrum in this case.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
